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diff --git a/node_modules/css-selector-tokenizer/LICENSE b/node_modules/css-selector-tokenizer/LICENSE
new file mode 100644
index 00000000..abdebcdd
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/LICENSE
@@ -0,0 +1,7 @@
+Copyright 2015 Tobias Koppers
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/node_modules/css-selector-tokenizer/README.md b/node_modules/css-selector-tokenizer/README.md
new file mode 100644
index 00000000..5d80690e
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/README.md
@@ -0,0 +1,94 @@
+# CSS Modules: CSS selector Tokenizer
+
+Parses and stringifies CSS selectors.
+
+``` js
+import Tokenizer from "css-selector-tokenizer";
+
+let input = "a#content.active > div::first-line [data-content], a:not(:visited)";
+
+Tokenizer.parse(input); // === expected
+let expected = {
+  type: "selectors",
+  nodes: [
+    {
+      type: "selector",
+      nodes: [
+        { type: "element", name: "a" },
+        { type: "id", name: "content" },
+        { type: "class", name: "active" },
+        { type: "operator", operator: ">", before: " ", after: " " },
+        { type: "element", name: "div" },
+        { type: "pseudo-element", name: "first-line" },
+        { type: "spacing", value: " " },
+        { type: "attribute", content: "data-content" },
+      ]
+    },
+    {
+      type: "selector",
+      nodes: [
+        { type: "element", name: "a" },
+        { type: "nested-pseudo-class", name: "not", nodes: [
+          {
+            type: "selector",
+            nodes: [
+              { type: "pseudo-class", name: "visited" }
+            ]
+          }
+        ] }
+      ],
+      before: " "
+    }
+  ]
+}
+
+Tokenizer.stringify(expected) // === input
+
+// * => { type: "universal" }
+// foo|element = { type: "element", name: "element", namespace: "foo" }
+// *|* = { type: "universal", namespace: "*" }
+// :has(h1, h2) => { type: "nested-pseudo-class", name: "has", nodes: [
+//     {
+//       type: "selector",
+//       nodes: [
+//         { type: "element", name: "h1" }
+//       ]
+//     },
+//     {
+//       type: "selector",
+//       nodes: [
+//         { type: "element", name: "h2" }
+//       ],
+//       before: " "
+//     }
+//   ] }
+```
+
+## Building
+
+```
+npm install
+npm test
+```
+
+[![Build Status](https://travis-ci.org/css-modules/css-selector-tokenizer.svg?branch=master)](https://travis-ci.org/css-modules/css-selector-tokenizer)
+
+* Lines: [![Coverage Status](https://coveralls.io/repos/css-modules/css-selector-tokenizer/badge.svg?branch=master)](https://coveralls.io/r/css-modules/css-selector-tokenizer?branch=master)
+* Statements: [![codecov.io](http://codecov.io/github/css-modules/css-selector-tokenizer/coverage.svg?branch=master)](http://codecov.io/github/css-modules/css-selector-tokenizer?branch=master)
+
+## Development
+
+- `npm autotest` will watch `lib` and `test` for changes and retest
+
+## License
+
+MIT
+
+## With thanks
+
+- Mark Dalgleish
+- Glen Maddern
+- Guy Bedford
+
+---
+Tobias Koppers, 2015.
diff --git a/node_modules/css-selector-tokenizer/lib/index.js b/node_modules/css-selector-tokenizer/lib/index.js
new file mode 100644
index 00000000..c1caeb8f
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/lib/index.js
@@ -0,0 +1,4 @@
+exports.parse = require("./parse");
+exports.stringify = require("./stringify");
+exports.parseValues = require("./parseValues");
+exports.stringifyValues = require("./stringifyValues");
diff --git a/node_modules/css-selector-tokenizer/lib/parse.js b/node_modules/css-selector-tokenizer/lib/parse.js
new file mode 100644
index 00000000..692373bf
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/lib/parse.js
@@ -0,0 +1,239 @@
+"use strict";
+
+var Parser = require("fastparse");
+var regexpu = require("regexpu-core");
+
+function unescape(str) {
+	return str.replace(/\\(.)/g, "$1");
+}
+
+function commentMatch(match, content) {
+	this.selector.nodes.push({
+		type: "comment",
+		content: content
+	});
+}
+
+function typeMatch(type) {
+	return function(match, name) {
+		this.selector.nodes.push({
+			type: type,
+			name: unescape(name)
+		});
+	};
+}
+
+function pseudoClassStartMatch(match, name) {
+	var newToken = {
+		type: "pseudo-class",
+		name: unescape(name),
+		content: ""
+	};
+	this.selector.nodes.push(newToken);
+	this.token = newToken;
+	this.brackets = 1;
+	return "inBrackets";
+}
+
+function nestedPseudoClassStartMatch(match, name, after) {
+	var newSelector = {
+		type: "selector",
+		nodes: []
+	};
+	var newToken = {
+		type: "nested-pseudo-class",
+		name: unescape(name),
+		nodes: [newSelector]
+	};
+	if(after) {
+		newSelector.before = after;
+	}
+	this.selector.nodes.push(newToken);
+	this.stack.push(this.root);
+	this.root = newToken;
+	this.selector = newSelector;
+}
+
+function nestedEnd(match, before) {
+	if(this.stack.length > 0) {
+		if(before) {
+			this.selector.after = before;
+		}
+		this.root = this.stack.pop();
+		this.selector = this.root.nodes[this.root.nodes.length - 1];
+	} else {
+		this.selector.nodes.push({
+			type: "invalid",
+			value: match
+		});
+	}
+}
+
+function operatorMatch(match, before, operator, after) {
+	var token = {
+		type: "operator",
+		operator: operator
+	};
+	if(before) {
+		token.before = before;
+	}
+	if(after) {
+		token.after = after;
+	}
+	this.selector.nodes.push(token);
+}
+
+function spacingMatch(match) {
+	this.selector.nodes.push({
+		type: "spacing",
+		value: match
+	});
+}
+
+function elementMatch(match, namespace, name) {
+	var newToken = {
+		type: "element",
+		name: unescape(name)
+	};
+
+	if(namespace) {
+		newToken.namespace = unescape(namespace.substr(0, namespace.length - 1));
+	}
+	this.selector.nodes.push(newToken);
+}
+
+function universalMatch(match, namespace) {
+	var newToken = {
+		type: "universal"
+	};
+	if(namespace) {
+		newToken.namespace = unescape(namespace.substr(0, namespace.length - 1));
+	}
+	this.selector.nodes.push(newToken);
+}
+
+function attributeMatch(match, content) {
+	this.selector.nodes.push({
+		type: "attribute",
+		content: content
+	});
+}
+
+function invalidMatch(match) {
+	this.selector.nodes.push({
+		type: "invalid",
+		value: match
+	});
+}
+
+function irrelevantSpacingStartMatch(match) {
+	this.selector.before = match;
+}
+
+function irrelevantSpacingEndMatch(match) {
+	this.selector.after = match;
+}
+
+function nextSelectorMatch(match, before, after) {
+	var newSelector = {
+		type: "selector",
+		nodes: []
+	};
+	if(before) {
+		this.selector.after = before;
+	}
+	if(after) {
+		newSelector.before = after;
+	}
+	this.root.nodes.push(newSelector);
+	this.selector = newSelector;
+}
+
+function addToCurrent(match) {
+	this.token.content += match;
+}
+
+function bracketStart(match) {
+	this.token.content += match;
+	this.brackets++;
+}
+
+function bracketEnd(match) {
+	if(--this.brackets === 0) {
+		return "selector";
+	}
+	this.token.content += match;
+}
+
+function getSelectors() {
+	// The assignment here is split to preserve the property enumeration order.
+	var selectors = {
+		"/\\*([\\s\\S]*?)\\*/": commentMatch
+	};
+	// https://www.w3.org/TR/CSS21/syndata.html#characters
+	// 4.1.3: identifiers (...) can contain only the characters [a-zA-Z0-9] and
+	// ISO 10646 characters U+00A0 and higher, plus the hyphen (-) and the underscore (_)
+	//
+	// 10ffff is the maximum allowed in current Unicode
+	selectors[regexpu("\\.((?:\\\\.|[A-Za-z_\\-\\u{00a0}-\\u{10ffff}])(?:\\\\.|[A-Za-z_\\-0-9\\u{00a0}-\\u{10ffff}])*)", "u")] = typeMatch("class");
+	selectors[regexpu("#((?:\\\\.|[A-Za-z_\\-\\u{00a0}-\\u{10ffff}])(?:\\\\.|[A-Za-z_\\-0-9\\u{00a0}-\\u{10ffff}])*)", "u")] = typeMatch("id");
+	var selectorsSecondHalf = {
+		":(not|matches|has|local|global)\\((\\s*)": nestedPseudoClassStartMatch,
+		":((?:\\\\.|[A-Za-z_\\-0-9])+)\\(": pseudoClassStartMatch,
+		":((?:\\\\.|[A-Za-z_\\-0-9])+)": typeMatch("pseudo-class"),
+		"::((?:\\\\.|[A-Za-z_\\-0-9])+)": typeMatch("pseudo-element"),
+		"(\\*\\|)((?:\\\\.|[A-Za-z_\\-0-9])+)": elementMatch,
+		"(\\*\\|)\\*": universalMatch,
+		"((?:\\\\.|[A-Za-z_\\-0-9])*\\|)?\\*": universalMatch,
+		"((?:\\\\.|[A-Za-z_\\-0-9])*\\|)?((?:\\\\.|[A-Za-z_\\-])(?:\\\\.|[A-Za-z_\\-0-9])*)": elementMatch,
+		"\\[([^\\]]+)\\]": attributeMatch,
+		"(\\s*)\\)": nestedEnd,
+		"(\\s*)((?:\\|\\|)|(?:>>)|[>+~])(\\s*)": operatorMatch,
+		"(\\s*),(\\s*)": nextSelectorMatch,
+		"\\s+$": irrelevantSpacingEndMatch,
+		"^\\s+": irrelevantSpacingStartMatch,
+		"\\s+": spacingMatch,
+		".": invalidMatch
+	};
+	var selector;
+	for (selector in selectorsSecondHalf) {
+		if (Object.prototype.hasOwnProperty.call(selectorsSecondHalf, selector)) {
+			selectors[selector] = selectorsSecondHalf[selector];
+		}
+	}
+	return selectors;
+}
+
+var parser = new Parser({
+	selector: getSelectors(),
+	inBrackets: {
+		"/\\*[\\s\\S]*?\\*/": addToCurrent,
+		"\"([^\\\\\"]|\\\\.)*\"": addToCurrent,
+		"'([^\\\\']|\\\\.)*'": addToCurrent,
+		"[^()'\"/]+": addToCurrent,
+		"\\(": bracketStart,
+		"\\)": bracketEnd,
+		".": addToCurrent
+	}
+});
+
+function parse(str) {
+	var selectorNode = {
+		type: "selector",
+		nodes: []
+	};
+	var rootNode = {
+		type: "selectors",
+		nodes: [
+			selectorNode
+		]
+	};
+	parser.parse("selector", str, {
+		stack: [],
+		root: rootNode,
+		selector: selectorNode
+	});
+	return rootNode;
+}
+
+module.exports = parse;
diff --git a/node_modules/css-selector-tokenizer/lib/parseValues.js b/node_modules/css-selector-tokenizer/lib/parseValues.js
new file mode 100644
index 00000000..97be01b0
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/lib/parseValues.js
@@ -0,0 +1,167 @@
+"use strict";
+
+var Parser = require("fastparse");
+
+function commentMatch(match, content) {
+	this.value.nodes.push({
+		type: "comment",
+		content: content
+	});
+}
+
+function spacingMatch(match) {
+	var item = this.value.nodes[this.value.nodes.length - 1];
+	item.after = (item.after || "") + match;
+}
+
+function initialSpacingMatch(match) {
+	this.value.before = match;
+}
+
+function endSpacingMatch(match) {
+	this.value.after = match;
+}
+
+function unescapeString(content) {
+	return content.replace(/\\(?:([a-fA-F0-9]{1,6})|(.))/g, function(all, unicode, otherCharacter) {
+		if (otherCharacter) {
+			return otherCharacter;
+		}
+
+		var C = parseInt(unicode, 16);
+		if(C < 0x10000) {
+			return String.fromCharCode(C);
+		} else {
+			return String.fromCharCode(Math.floor((C - 0x10000) / 0x400) + 0xD800) +
+				String.fromCharCode((C - 0x10000) % 0x400 + 0xDC00);
+		}
+	});
+}
+
+function stringMatch(match, content) {
+	var value = unescapeString(content);
+	this.value.nodes.push({
+		type: "string",
+		value: value,
+		stringType: match[0]
+	});
+}
+
+function commaMatch(match, spacing) {
+	var newValue = {
+		type: "value",
+		nodes: []
+	};
+	if(spacing) {
+		newValue.before = spacing;
+	}
+	this.root.nodes.push(newValue);
+	this.value = newValue;
+}
+
+function itemMatch(match) {
+	this.value.nodes.push({
+		type: "item",
+		name: match
+	});
+}
+
+function nestedItemMatch(match, name, spacing) {
+	this.stack.push(this.root);
+	this.root = {
+		type: "nested-item",
+		name: name,
+		nodes: [
+			{ type: "value", nodes: [] }
+		]
+	};
+	if(spacing) {
+		this.root.nodes[0].before = spacing;
+	}
+	this.value.nodes.push(this.root);
+	this.value = this.root.nodes[0];
+}
+
+function nestedItemEndMatch(match, spacing, remaining) {
+	if(this.stack.length === 0) {
+		if(spacing) {
+			var item = this.value.nodes[this.value.nodes.length - 1];
+			item.after = (item.after || "") + spacing;
+		}
+		this.value.nodes.push({
+			type: "invalid",
+			value: remaining
+		});
+	} else {
+		if(spacing) {
+			this.value.after = spacing;
+		}
+		this.root = this.stack.pop();
+		this.value = this.root.nodes[this.root.nodes.length - 1];
+	}
+}
+
+function urlMatch(match, innerSpacingBefore, content, innerSpacingAfter) {
+	var item = {
+		type: "url"
+	};
+	if(innerSpacingBefore) {
+		item.innerSpacingBefore = innerSpacingBefore;
+	}
+	if(innerSpacingAfter) {
+		item.innerSpacingAfter = innerSpacingAfter;
+	}
+	switch(content[0]) {
+		case "\"":
+			item.stringType = "\"";
+			item.url = unescapeString(content.substr(1, content.length - 2));
+			break;
+		case "'":
+			item.stringType = "'";
+			item.url = unescapeString(content.substr(1, content.length - 2));
+			break;
+		default:
+			item.url = unescapeString(content);
+			break;
+	}
+	this.value.nodes.push(item);
+}
+
+var parser = new Parser({
+	decl: {
+		"^\\s+": initialSpacingMatch,
+		"/\\*([\\s\\S]*?)\\*/": commentMatch,
+		"\"((?:[^\\\\\"]|\\\\.)*)\"": stringMatch,
+		"'((?:[^\\\\']|\\\\.)*)'": stringMatch,
+		"url\\((\\s*)(\"(?:[^\\\\\"]|\\\\.)*\")(\\s*)\\)": urlMatch,
+		"url\\((\\s*)('(?:[^\\\\']|\\\\.)*')(\\s*)\\)": urlMatch,
+		"url\\((\\s*)((?:[^\\\\)'\"]|\\\\.)*)(\\s*)\\)": urlMatch,
+		"([\\w\-]+)\\((\\s*)": nestedItemMatch,
+		"(\\s*)(\\))": nestedItemEndMatch,
+		",(\\s*)": commaMatch,
+		"\\s+$": endSpacingMatch,
+		"\\s+": spacingMatch,
+		"[^\\s,\)]+": itemMatch
+	}
+});
+
+function parseValues(str) {
+	var valueNode = {
+		type: "value",
+		nodes: []
+	};
+	var rootNode = {
+		type: "values",
+		nodes: [
+			valueNode
+		]
+	};
+	parser.parse("decl", str, {
+		stack: [],
+		root: rootNode,
+		value: valueNode
+	});
+	return rootNode;
+}
+
+module.exports = parseValues;
diff --git a/node_modules/css-selector-tokenizer/lib/stringify.js b/node_modules/css-selector-tokenizer/lib/stringify.js
new file mode 100644
index 00000000..1c9d6aa3
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/lib/stringify.js
@@ -0,0 +1,67 @@
+"use strict";
+
+var stringify;
+
+var regexpu = require("regexpu-core");
+var identifierEscapeRegexp = new RegExp(
+	regexpu("(^[^A-Za-z_\\-\\u{00a0}-\\u{10ffff}]|^\\-\\-|[^A-Za-z_0-9\\-\\u{00a0}-\\u{10ffff}])", "ug"),
+	"g"
+);
+
+function escape(str, identifier) {
+	if(str === "*") {
+		return "*";
+	}
+	if (identifier) {
+		return str.replace(identifierEscapeRegexp, "\\$1");
+	} else {
+		return str.replace(/(^[^A-Za-z_\\-]|^\-\-|[^A-Za-z_0-9\\-])/g, "\\$1");
+	}
+}
+
+function stringifyWithoutBeforeAfter(tree) {
+	switch(tree.type) {
+	case "selectors":
+		return tree.nodes.map(stringify).join(",");
+	case "selector":
+		return tree.nodes.map(stringify).join("");
+	case "element":
+		return (typeof tree.namespace === "string" ? escape(tree.namespace) + "|" : "") + escape(tree.name);
+	case "class":
+		return "." + escape(tree.name, true);
+	case "id":
+		return "#" + escape(tree.name, true);
+	case "attribute":
+		return "[" + tree.content + "]";
+	case "spacing":
+		return tree.value;
+	case "pseudo-class":
+		return ":" + escape(tree.name) + (typeof tree.content === "string" ? "(" + tree.content + ")" : "");
+	case "nested-pseudo-class":
+		return ":" + escape(tree.name) + "(" + tree.nodes.map(stringify).join(",") + ")";
+	case "pseudo-element":
+		return "::" + escape(tree.name);
+	case "universal":
+		return (typeof tree.namespace === "string" ? escape(tree.namespace) + "|" : "") + "*";
+	case "operator":
+		return tree.operator;
+	case "comment":
+		return "/*" + tree.content + "*/";
+	case "invalid":
+		return tree.value;
+	}
+}
+
+
+stringify = function stringify(tree) {
+	var str = stringifyWithoutBeforeAfter(tree);
+	if(tree.before) {
+		str = tree.before + str;
+	}
+	if(tree.after) {
+		str = str + tree.after;
+	}
+	return str;
+};
+
+module.exports = stringify;
diff --git a/node_modules/css-selector-tokenizer/lib/stringifyValues.js b/node_modules/css-selector-tokenizer/lib/stringifyValues.js
new file mode 100644
index 00000000..a61d8d52
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/lib/stringifyValues.js
@@ -0,0 +1,62 @@
+"use strict";
+
+var cssesc = require("cssesc");
+
+var stringify;
+
+function escape(str, stringType) {
+	return cssesc(str, {
+		quotes: stringType === "\"" ? "double" : "single"
+	});
+}
+
+function stringifyWithoutBeforeAfter(tree) {
+	switch(tree.type) {
+	case "values":
+		return tree.nodes.map(stringify).join(",");
+	case "value":
+		return tree.nodes.map(stringify).join("");
+	case "item":
+		return tree.name;
+	case "nested-item":
+		return tree.name + "(" + tree.nodes.map(stringify).join(",") + ")";
+	case "invalid":
+		return tree.value;
+	case "comment":
+		return "/*" + tree.content + "*/";
+	case "string":
+		switch(tree.stringType) {
+		case "'":
+			return "'" + escape(tree.value, "'") + "'";
+		case "\"":
+			return "\"" + escape(tree.value, "\"") + "\"";
+		}
+		/* istanbul ignore next */
+		throw new Error("Invalid stringType");
+	case "url":
+		var start = "url(" + (tree.innerSpacingBefore || "");
+		var end = (tree.innerSpacingAfter || "") + ")";
+		switch(tree.stringType) {
+		case "'":
+			return start + "'" + tree.url.replace(/(\\)/g, "\\$1").replace(/'/g, "\\'") + "'" + end;
+		case "\"":
+			return start + "\"" + tree.url.replace(/(\\)/g, "\\$1").replace(/"/g, "\\\"") + "\"" + end;
+		default:
+			return start + tree.url.replace(/("|'|\)|\\)/g, "\\$1") + end;
+		}
+	}
+}
+
+
+stringify = function stringify(tree) {
+	var str = stringifyWithoutBeforeAfter(tree);
+	if(tree.before) {
+		str = tree.before + str;
+	}
+	if(tree.after) {
+		str = str + tree.after;
+	}
+	return str;
+};
+
+module.exports = stringify;
diff --git a/node_modules/css-selector-tokenizer/node_modules/.bin/cssesc b/node_modules/css-selector-tokenizer/node_modules/.bin/cssesc
new file mode 120000
index 00000000..7ba2ed9b
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/.bin/cssesc
@@ -0,0 +1 @@
+../../../cssesc/bin/cssesc
\ No newline at end of file
diff --git a/node_modules/css-selector-tokenizer/node_modules/regexpu-core/LICENSE-MIT.txt b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/LICENSE-MIT.txt
new file mode 100644
index 00000000..a41e0a7e
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/LICENSE-MIT.txt
@@ -0,0 +1,20 @@
+Copyright Mathias Bynens <https://mathiasbynens.be/>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/node_modules/css-selector-tokenizer/node_modules/regexpu-core/README.md b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/README.md
new file mode 100644
index 00000000..1f80cd89
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/README.md
@@ -0,0 +1,62 @@
+# regexpu-core [![Build status](https://travis-ci.org/mathiasbynens/regexpu-core.svg?branch=master)](https://travis-ci.org/mathiasbynens/regexpu-core) [![Code coverage status](http://img.shields.io/coveralls/mathiasbynens/regexpu-core/master.svg)](https://coveralls.io/r/mathiasbynens/regexpu-core) [![Dependency status](https://gemnasium.com/mathiasbynens/regexpu-core.svg)](https://gemnasium.com/mathiasbynens/regexpu-core)
+
+_regexpu_ is a source code transpiler that enables the use of ES6 Unicode regular expressions in JavaScript-of-today (ES5).
+
+_regexpu-core_ contains _regexpu_’s core functionality, i.e. `rewritePattern(pattern, flag)`, which enables rewriting regular expressions that make use of [the ES6 `u` flag](https://mathiasbynens.be/notes/es6-unicode-regex) into equivalent ES5-compatible regular expression patterns.
+
+## Installation
+
+To use _regexpu-core_ programmatically, install it as a dependency via [npm](https://www.npmjs.com/):
+
+```bash
+npm install regexpu-core --save-dev
+```
+
+Then, `require` it:
+
+```js
+const rewritePattern = require('regexpu-core');
+```
+
+## API
+
+This module exports a single function named `rewritePattern`.
+
+### `rewritePattern(pattern, flags)`
+
+This function takes a string that represents a regular expression pattern as well as a string representing its flags, and returns an ES5-compatible version of the pattern.
+
+```js
+rewritePattern('foo.bar', 'u');
+// → 'foo(?:[\\0-\\t\\x0B\\f\\x0E-\\u2027\\u202A-\\uD7FF\\uDC00-\\uFFFF]|[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]|[\\uD800-\\uDBFF])bar'
+
+rewritePattern('[\\u{1D306}-\\u{1D308}a-z]', 'u');
+// → '(?:[a-z]|\\uD834[\\uDF06-\\uDF08])'
+
+rewritePattern('[\\u{1D306}-\\u{1D308}a-z]', 'ui');
+// → '(?:[a-z\\u017F\\u212A]|\\uD834[\\uDF06-\\uDF08])'
+```
+
+_regexpu-core_ can rewrite non-ES6 regular expressions too, which is useful to demonstrate how their behavior changes once the `u` and `i` flags are added:
+
+```js
+// In ES5, the dot operator only matches BMP symbols:
+rewritePattern('foo.bar');
+// → 'foo(?:[\\0-\\t\\x0B\\f\\x0E-\\u2027\\u202A-\\uFFFF])bar'
+
+// But with the ES6 `u` flag, it matches astral symbols too:
+rewritePattern('foo.bar', 'u');
+// → 'foo(?:[\\0-\\t\\x0B\\f\\x0E-\\u2027\\u202A-\\uD7FF\\uDC00-\\uFFFF]|[\\uD800-\\uDBFF][\\uDC00-\\uDFFF]|[\\uD800-\\uDBFF])bar'
+```
+
+`rewritePattern` uses [regjsgen](https://github.com/d10/regjsgen), [regjsparser](https://github.com/jviereck/regjsparser), and [regenerate](https://github.com/mathiasbynens/regenerate) as internal dependencies.
+
+## Author
+
+| [![twitter/mathias](https://gravatar.com/avatar/24e08a9ea84deb17ae121074d0f17125?s=70)](https://twitter.com/mathias "Follow @mathias on Twitter") |
+|---|
+| [Mathias Bynens](https://mathiasbynens.be/) |
+
+## License
+
+_regexpu-core_ is available under the [MIT](https://mths.be/mit) license.
diff --git a/node_modules/css-selector-tokenizer/node_modules/regexpu-core/data/character-class-escape-sets.js b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/data/character-class-escape-sets.js
new file mode 100644
index 00000000..f99c83ed
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/data/character-class-escape-sets.js
@@ -0,0 +1,104 @@
+// Generated by `/scripts/character-class-escape-sets.js`. Do not edit.
+var regenerate = require('regenerate');
+
+exports.REGULAR = {
+	'd': regenerate()
+		.addRange(0x30, 0x39),
+	'D': regenerate()
+		.addRange(0x0, 0x2F)
+		.addRange(0x3A, 0xFFFF),
+	's': regenerate(0x20, 0xA0, 0x1680, 0x180E, 0x202F, 0x205F, 0x3000, 0xFEFF)
+		.addRange(0x9, 0xD)
+		.addRange(0x2000, 0x200A)
+		.addRange(0x2028, 0x2029),
+	'S': regenerate()
+		.addRange(0x0, 0x8)
+		.addRange(0xE, 0x1F)
+		.addRange(0x21, 0x9F)
+		.addRange(0xA1, 0x167F)
+		.addRange(0x1681, 0x180D)
+		.addRange(0x180F, 0x1FFF)
+		.addRange(0x200B, 0x2027)
+		.addRange(0x202A, 0x202E)
+		.addRange(0x2030, 0x205E)
+		.addRange(0x2060, 0x2FFF)
+		.addRange(0x3001, 0xFEFE)
+		.addRange(0xFF00, 0xFFFF),
+	'w': regenerate(0x5F)
+		.addRange(0x30, 0x39)
+		.addRange(0x41, 0x5A)
+		.addRange(0x61, 0x7A),
+	'W': regenerate(0x60)
+		.addRange(0x0, 0x2F)
+		.addRange(0x3A, 0x40)
+		.addRange(0x5B, 0x5E)
+		.addRange(0x7B, 0xFFFF)
+};
+
+exports.UNICODE = {
+	'd': regenerate()
+		.addRange(0x30, 0x39),
+	'D': regenerate()
+		.addRange(0x0, 0x2F)
+		.addRange(0x3A, 0x10FFFF),
+	's': regenerate(0x20, 0xA0, 0x1680, 0x180E, 0x202F, 0x205F, 0x3000, 0xFEFF)
+		.addRange(0x9, 0xD)
+		.addRange(0x2000, 0x200A)
+		.addRange(0x2028, 0x2029),
+	'S': regenerate()
+		.addRange(0x0, 0x8)
+		.addRange(0xE, 0x1F)
+		.addRange(0x21, 0x9F)
+		.addRange(0xA1, 0x167F)
+		.addRange(0x1681, 0x180D)
+		.addRange(0x180F, 0x1FFF)
+		.addRange(0x200B, 0x2027)
+		.addRange(0x202A, 0x202E)
+		.addRange(0x2030, 0x205E)
+		.addRange(0x2060, 0x2FFF)
+		.addRange(0x3001, 0xFEFE)
+		.addRange(0xFF00, 0x10FFFF),
+	'w': regenerate(0x5F)
+		.addRange(0x30, 0x39)
+		.addRange(0x41, 0x5A)
+		.addRange(0x61, 0x7A),
+	'W': regenerate(0x60)
+		.addRange(0x0, 0x2F)
+		.addRange(0x3A, 0x40)
+		.addRange(0x5B, 0x5E)
+		.addRange(0x7B, 0x10FFFF)
+};
+
+exports.UNICODE_IGNORE_CASE = {
+	'd': regenerate()
+		.addRange(0x30, 0x39),
+	'D': regenerate()
+		.addRange(0x0, 0x2F)
+		.addRange(0x3A, 0x10FFFF),
+	's': regenerate(0x20, 0xA0, 0x1680, 0x180E, 0x202F, 0x205F, 0x3000, 0xFEFF)
+		.addRange(0x9, 0xD)
+		.addRange(0x2000, 0x200A)
+		.addRange(0x2028, 0x2029),
+	'S': regenerate()
+		.addRange(0x0, 0x8)
+		.addRange(0xE, 0x1F)
+		.addRange(0x21, 0x9F)
+		.addRange(0xA1, 0x167F)
+		.addRange(0x1681, 0x180D)
+		.addRange(0x180F, 0x1FFF)
+		.addRange(0x200B, 0x2027)
+		.addRange(0x202A, 0x202E)
+		.addRange(0x2030, 0x205E)
+		.addRange(0x2060, 0x2FFF)
+		.addRange(0x3001, 0xFEFE)
+		.addRange(0xFF00, 0x10FFFF),
+	'w': regenerate(0x5F, 0x17F, 0x212A)
+		.addRange(0x30, 0x39)
+		.addRange(0x41, 0x5A)
+		.addRange(0x61, 0x7A),
+	'W': regenerate(0x4B, 0x53, 0x60)
+		.addRange(0x0, 0x2F)
+		.addRange(0x3A, 0x40)
+		.addRange(0x5B, 0x5E)
+		.addRange(0x7B, 0x10FFFF)
+};
diff --git a/node_modules/css-selector-tokenizer/node_modules/regexpu-core/data/iu-mappings.json b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/data/iu-mappings.json
new file mode 100644
index 00000000..dbf36a2f
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/data/iu-mappings.json
@@ -0,0 +1,296 @@
+{
+	"75": 8490,
+	"83": 383,
+	"107": 8490,
+	"115": 383,
+	"181": 924,
+	"197": 8491,
+	"383": 83,
+	"452": 453,
+	"453": 452,
+	"455": 456,
+	"456": 455,
+	"458": 459,
+	"459": 458,
+	"497": 498,
+	"498": 497,
+	"837": 8126,
+	"914": 976,
+	"917": 1013,
+	"920": 1012,
+	"921": 8126,
+	"922": 1008,
+	"924": 181,
+	"928": 982,
+	"929": 1009,
+	"931": 962,
+	"934": 981,
+	"937": 8486,
+	"962": 931,
+	"976": 914,
+	"977": 1012,
+	"981": 934,
+	"982": 928,
+	"1008": 922,
+	"1009": 929,
+	"1012": [
+		920,
+		977
+	],
+	"1013": 917,
+	"7776": 7835,
+	"7835": 7776,
+	"8126": [
+		837,
+		921
+	],
+	"8486": 937,
+	"8490": 75,
+	"8491": 197,
+	"66560": 66600,
+	"66561": 66601,
+	"66562": 66602,
+	"66563": 66603,
+	"66564": 66604,
+	"66565": 66605,
+	"66566": 66606,
+	"66567": 66607,
+	"66568": 66608,
+	"66569": 66609,
+	"66570": 66610,
+	"66571": 66611,
+	"66572": 66612,
+	"66573": 66613,
+	"66574": 66614,
+	"66575": 66615,
+	"66576": 66616,
+	"66577": 66617,
+	"66578": 66618,
+	"66579": 66619,
+	"66580": 66620,
+	"66581": 66621,
+	"66582": 66622,
+	"66583": 66623,
+	"66584": 66624,
+	"66585": 66625,
+	"66586": 66626,
+	"66587": 66627,
+	"66588": 66628,
+	"66589": 66629,
+	"66590": 66630,
+	"66591": 66631,
+	"66592": 66632,
+	"66593": 66633,
+	"66594": 66634,
+	"66595": 66635,
+	"66596": 66636,
+	"66597": 66637,
+	"66598": 66638,
+	"66599": 66639,
+	"66600": 66560,
+	"66601": 66561,
+	"66602": 66562,
+	"66603": 66563,
+	"66604": 66564,
+	"66605": 66565,
+	"66606": 66566,
+	"66607": 66567,
+	"66608": 66568,
+	"66609": 66569,
+	"66610": 66570,
+	"66611": 66571,
+	"66612": 66572,
+	"66613": 66573,
+	"66614": 66574,
+	"66615": 66575,
+	"66616": 66576,
+	"66617": 66577,
+	"66618": 66578,
+	"66619": 66579,
+	"66620": 66580,
+	"66621": 66581,
+	"66622": 66582,
+	"66623": 66583,
+	"66624": 66584,
+	"66625": 66585,
+	"66626": 66586,
+	"66627": 66587,
+	"66628": 66588,
+	"66629": 66589,
+	"66630": 66590,
+	"66631": 66591,
+	"66632": 66592,
+	"66633": 66593,
+	"66634": 66594,
+	"66635": 66595,
+	"66636": 66596,
+	"66637": 66597,
+	"66638": 66598,
+	"66639": 66599,
+	"68736": 68800,
+	"68737": 68801,
+	"68738": 68802,
+	"68739": 68803,
+	"68740": 68804,
+	"68741": 68805,
+	"68742": 68806,
+	"68743": 68807,
+	"68744": 68808,
+	"68745": 68809,
+	"68746": 68810,
+	"68747": 68811,
+	"68748": 68812,
+	"68749": 68813,
+	"68750": 68814,
+	"68751": 68815,
+	"68752": 68816,
+	"68753": 68817,
+	"68754": 68818,
+	"68755": 68819,
+	"68756": 68820,
+	"68757": 68821,
+	"68758": 68822,
+	"68759": 68823,
+	"68760": 68824,
+	"68761": 68825,
+	"68762": 68826,
+	"68763": 68827,
+	"68764": 68828,
+	"68765": 68829,
+	"68766": 68830,
+	"68767": 68831,
+	"68768": 68832,
+	"68769": 68833,
+	"68770": 68834,
+	"68771": 68835,
+	"68772": 68836,
+	"68773": 68837,
+	"68774": 68838,
+	"68775": 68839,
+	"68776": 68840,
+	"68777": 68841,
+	"68778": 68842,
+	"68779": 68843,
+	"68780": 68844,
+	"68781": 68845,
+	"68782": 68846,
+	"68783": 68847,
+	"68784": 68848,
+	"68785": 68849,
+	"68786": 68850,
+	"68800": 68736,
+	"68801": 68737,
+	"68802": 68738,
+	"68803": 68739,
+	"68804": 68740,
+	"68805": 68741,
+	"68806": 68742,
+	"68807": 68743,
+	"68808": 68744,
+	"68809": 68745,
+	"68810": 68746,
+	"68811": 68747,
+	"68812": 68748,
+	"68813": 68749,
+	"68814": 68750,
+	"68815": 68751,
+	"68816": 68752,
+	"68817": 68753,
+	"68818": 68754,
+	"68819": 68755,
+	"68820": 68756,
+	"68821": 68757,
+	"68822": 68758,
+	"68823": 68759,
+	"68824": 68760,
+	"68825": 68761,
+	"68826": 68762,
+	"68827": 68763,
+	"68828": 68764,
+	"68829": 68765,
+	"68830": 68766,
+	"68831": 68767,
+	"68832": 68768,
+	"68833": 68769,
+	"68834": 68770,
+	"68835": 68771,
+	"68836": 68772,
+	"68837": 68773,
+	"68838": 68774,
+	"68839": 68775,
+	"68840": 68776,
+	"68841": 68777,
+	"68842": 68778,
+	"68843": 68779,
+	"68844": 68780,
+	"68845": 68781,
+	"68846": 68782,
+	"68847": 68783,
+	"68848": 68784,
+	"68849": 68785,
+	"68850": 68786,
+	"71840": 71872,
+	"71841": 71873,
+	"71842": 71874,
+	"71843": 71875,
+	"71844": 71876,
+	"71845": 71877,
+	"71846": 71878,
+	"71847": 71879,
+	"71848": 71880,
+	"71849": 71881,
+	"71850": 71882,
+	"71851": 71883,
+	"71852": 71884,
+	"71853": 71885,
+	"71854": 71886,
+	"71855": 71887,
+	"71856": 71888,
+	"71857": 71889,
+	"71858": 71890,
+	"71859": 71891,
+	"71860": 71892,
+	"71861": 71893,
+	"71862": 71894,
+	"71863": 71895,
+	"71864": 71896,
+	"71865": 71897,
+	"71866": 71898,
+	"71867": 71899,
+	"71868": 71900,
+	"71869": 71901,
+	"71870": 71902,
+	"71871": 71903,
+	"71872": 71840,
+	"71873": 71841,
+	"71874": 71842,
+	"71875": 71843,
+	"71876": 71844,
+	"71877": 71845,
+	"71878": 71846,
+	"71879": 71847,
+	"71880": 71848,
+	"71881": 71849,
+	"71882": 71850,
+	"71883": 71851,
+	"71884": 71852,
+	"71885": 71853,
+	"71886": 71854,
+	"71887": 71855,
+	"71888": 71856,
+	"71889": 71857,
+	"71890": 71858,
+	"71891": 71859,
+	"71892": 71860,
+	"71893": 71861,
+	"71894": 71862,
+	"71895": 71863,
+	"71896": 71864,
+	"71897": 71865,
+	"71898": 71866,
+	"71899": 71867,
+	"71900": 71868,
+	"71901": 71869,
+	"71902": 71870,
+	"71903": 71871
+}
diff --git a/node_modules/css-selector-tokenizer/node_modules/regexpu-core/node_modules/.bin/regjsparser b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/node_modules/.bin/regjsparser
new file mode 120000
index 00000000..2e1b4926
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/node_modules/.bin/regjsparser
@@ -0,0 +1 @@
+../../../regjsparser/bin/parser
\ No newline at end of file
diff --git a/node_modules/css-selector-tokenizer/node_modules/regexpu-core/package.json b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/package.json
new file mode 100644
index 00000000..c08a7681
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/package.json
@@ -0,0 +1,62 @@
+{
+	"name": "regexpu-core",
+	"version": "1.0.0",
+	"description": "regexpu’s core functionality (i.e. `rewritePattern(pattern, flag)`), capable of translating ES6 Unicode regular expressions to ES5.",
+	"homepage": "https://mths.be/regexpu",
+	"main": "rewrite-pattern.js",
+	"keywords": [
+		"codegen",
+		"desugaring",
+		"ecmascript",
+		"es5",
+		"es6",
+		"harmony",
+		"javascript",
+		"refactoring",
+		"regex",
+		"regexp",
+		"regular expressions",
+		"rewriting",
+		"syntax",
+		"transformation",
+		"transpile",
+		"transpiler",
+		"unicode"
+	],
+	"license": "MIT",
+	"author": {
+		"name": "Mathias Bynens",
+		"url": "https://mathiasbynens.be/"
+	},
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/mathiasbynens/regexpu-core.git"
+	},
+	"bugs": "https://github.com/mathiasbynens/regexpu-core/issues",
+	"files": [
+		"LICENSE-MIT.txt",
+		"rewrite-pattern.js",
+		"data/character-class-escape-sets.js",
+		"data/iu-mappings.json"
+	],
+	"scripts": {
+		"build": "node scripts/iu-mappings.js && node scripts/character-class-escape-sets.js",
+		"test": "mocha tests",
+		"coverage": "istanbul cover --report html node_modules/.bin/_mocha tests/tests.js -- -u exports -R spec"
+	},
+	"dependencies": {
+		"regenerate": "^1.2.1",
+		"regjsgen": "^0.2.0",
+		"regjsparser": "^0.1.4"
+	},
+	"devDependencies": {
+		"coveralls": "^2.11.2",
+		"istanbul": "^0.4.0",
+		"jsesc": "^0.5.0",
+		"lodash": "^3.6.0",
+		"mocha": "^2.2.1",
+		"regexpu-fixtures": "^1.0.0",
+		"unicode-5.1.0": "^0.1.5",
+		"unicode-8.0.0": "^0.1.5"
+	}
+}
diff --git a/node_modules/css-selector-tokenizer/node_modules/regexpu-core/rewrite-pattern.js b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/rewrite-pattern.js
new file mode 100644
index 00000000..47a78543
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regexpu-core/rewrite-pattern.js
@@ -0,0 +1,193 @@
+var generate = require('regjsgen').generate;
+var parse = require('regjsparser').parse;
+var regenerate = require('regenerate');
+var iuMappings = require('./data/iu-mappings.json');
+var ESCAPE_SETS = require('./data/character-class-escape-sets.js');
+
+function getCharacterClassEscapeSet(character) {
+	if (unicode) {
+		if (ignoreCase) {
+			return ESCAPE_SETS.UNICODE_IGNORE_CASE[character];
+		}
+		return ESCAPE_SETS.UNICODE[character];
+	}
+	return ESCAPE_SETS.REGULAR[character];
+}
+
+var object = {};
+var hasOwnProperty = object.hasOwnProperty;
+function has(object, property) {
+	return hasOwnProperty.call(object, property);
+}
+
+// Prepare a Regenerate set containing all code points, used for negative
+// character classes (if any).
+var UNICODE_SET = regenerate().addRange(0x0, 0x10FFFF);
+// Without the `u` flag, the range stops at 0xFFFF.
+// https://mths.be/es6#sec-pattern-semantics
+var BMP_SET = regenerate().addRange(0x0, 0xFFFF);
+
+// Prepare a Regenerate set containing all code points that are supposed to be
+// matched by `/./u`. https://mths.be/es6#sec-atom
+var DOT_SET_UNICODE = UNICODE_SET.clone() // all Unicode code points
+	.remove(
+		// minus `LineTerminator`s (https://mths.be/es6#sec-line-terminators):
+		0x000A, // Line Feed <LF>
+		0x000D, // Carriage Return <CR>
+		0x2028, // Line Separator <LS>
+		0x2029  // Paragraph Separator <PS>
+	);
+// Prepare a Regenerate set containing all code points that are supposed to be
+// matched by `/./` (only BMP code points).
+var DOT_SET = DOT_SET_UNICODE.clone()
+	.intersection(BMP_SET);
+
+// Add a range of code points + any case-folded code points in that range to a
+// set.
+regenerate.prototype.iuAddRange = function(min, max) {
+	var $this = this;
+	do {
+		var folded = caseFold(min);
+		if (folded) {
+			$this.add(folded);
+		}
+	} while (++min <= max);
+	return $this;
+};
+
+function assign(target, source) {
+	for (var key in source) {
+		// Note: `hasOwnProperty` is not needed here.
+		target[key] = source[key];
+	}
+}
+
+function update(item, pattern) {
+	// TODO: Test if memoizing `pattern` here is worth the effort.
+	if (!pattern) {
+		return;
+	}
+	var tree = parse(pattern, '');
+	switch (tree.type) {
+		case 'characterClass':
+		case 'group':
+		case 'value':
+			// No wrapping needed.
+			break;
+		default:
+			// Wrap the pattern in a non-capturing group.
+			tree = wrap(tree, pattern);
+	}
+	assign(item, tree);
+}
+
+function wrap(tree, pattern) {
+	// Wrap the pattern in a non-capturing group.
+	return {
+		'type': 'group',
+		'behavior': 'ignore',
+		'body': [tree],
+		'raw': '(?:' + pattern + ')'
+	};
+}
+
+function caseFold(codePoint) {
+	return has(iuMappings, codePoint) ? iuMappings[codePoint] : false;
+}
+
+var ignoreCase = false;
+var unicode = false;
+function processCharacterClass(characterClassItem) {
+	var set = regenerate();
+	var body = characterClassItem.body.forEach(function(item) {
+		switch (item.type) {
+			case 'value':
+				set.add(item.codePoint);
+				if (ignoreCase && unicode) {
+					var folded = caseFold(item.codePoint);
+					if (folded) {
+						set.add(folded);
+					}
+				}
+				break;
+			case 'characterClassRange':
+				var min = item.min.codePoint;
+				var max = item.max.codePoint;
+				set.addRange(min, max);
+				if (ignoreCase && unicode) {
+					set.iuAddRange(min, max);
+				}
+				break;
+			case 'characterClassEscape':
+				set.add(getCharacterClassEscapeSet(item.value));
+				break;
+			// The `default` clause is only here as a safeguard; it should never be
+			// reached. Code coverage tools should ignore it.
+			/* istanbul ignore next */
+			default:
+				throw Error('Unknown term type: ' + item.type);
+		}
+	});
+	if (characterClassItem.negative) {
+		set = (unicode ? UNICODE_SET : BMP_SET).clone().remove(set);
+	}
+	update(characterClassItem, set.toString());
+	return characterClassItem;
+}
+
+function processTerm(item) {
+	switch (item.type) {
+		case 'dot':
+			update(
+				item,
+				(unicode ? DOT_SET_UNICODE : DOT_SET).toString()
+			);
+			break;
+		case 'characterClass':
+			item = processCharacterClass(item);
+			break;
+		case 'characterClassEscape':
+			update(
+				item,
+				getCharacterClassEscapeSet(item.value).toString()
+			);
+			break;
+		case 'alternative':
+		case 'disjunction':
+		case 'group':
+		case 'quantifier':
+			item.body = item.body.map(processTerm);
+			break;
+		case 'value':
+			var codePoint = item.codePoint;
+			var set = regenerate(codePoint);
+			if (ignoreCase && unicode) {
+				var folded = caseFold(codePoint);
+				if (folded) {
+					set.add(folded);
+				}
+			}
+			update(item, set.toString());
+			break;
+		case 'anchor':
+		case 'empty':
+		case 'group':
+		case 'reference':
+			// Nothing to do here.
+			break;
+		// The `default` clause is only here as a safeguard; it should never be
+		// reached. Code coverage tools should ignore it.
+		/* istanbul ignore next */
+		default:
+			throw Error('Unknown term type: ' + item.type);
+	}
+	return item;
+};
+
+module.exports = function(pattern, flags) {
+	var tree = parse(pattern, flags);
+	ignoreCase = flags ? flags.indexOf('i') > -1 : false;
+	unicode = flags ? flags.indexOf('u') > -1 : false;
+	assign(tree, processTerm(tree));
+	return generate(tree);
+};
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsgen/LICENSE.txt b/node_modules/css-selector-tokenizer/node_modules/regjsgen/LICENSE.txt
new file mode 100644
index 00000000..2aab83e2
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsgen/LICENSE.txt
@@ -0,0 +1,20 @@
+Copyright 2014 Benjamin Tan <demoneaux@gmail.com> (https://d10.github.io/)

+

+Permission is hereby granted, free of charge, to any person obtaining

+a copy of this software and associated documentation files (the

+"Software"), to deal in the Software without restriction, including

+without limitation the rights to use, copy, modify, merge, publish,

+distribute, sublicense, and/or sell copies of the Software, and to

+permit persons to whom the Software is furnished to do so, subject to

+the following conditions:

+

+The above copyright notice and this permission notice shall be

+included in all copies or substantial portions of the Software.

+

+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsgen/README.md b/node_modules/css-selector-tokenizer/node_modules/regjsgen/README.md
new file mode 100644
index 00000000..0a4dcd0c
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsgen/README.md
@@ -0,0 +1,60 @@
+# RegJSGen
+
+Generate `RegExp`s from [RegJSParser](https://github.com/jviereck/regjsparser)’s AST.
+
+## Installation
+
+```bash
+npm install --save regjsgen
+```
+
+## Usage
+
+```js
+var regjsgen = require('regjsgen');
+// With `regjsparser`
+var regjsparser = require('regjsparser');
+var regex = '^a$';
+var ast = regjsparser.parse(regex);
+// Modify AST
+// ...
+// Regenerate `RegExp`
+regex = regjsgen.generate(ast);
+```
+
+## See Also
+
+ * [RegJSParser](https://github.com/jviereck/regjsparser)
+ * [RegExp.js](https://github.com/jviereck/regexp.js)
+
+## Testing
+
+Run the command
+
+```bash
+npm test
+```
+
+To create a new reference file, execute
+
+```bash
+node test/update-fixture.js
+```
+
+from the repo top directory.
+
+## Support
+
+Tested in Node.js 0.8.26~0.10.30.
+
+## Author
+
+| [![twitter/demoneaux](http://gravatar.com/avatar/029b19dba521584d83398ada3ecf6131?s=70)](https://twitter.com/demoneaux "Follow @demoneaux on Twitter") |
+|---|
+| [Benjamin Tan](http://d10.github.io/) |
+
+## Contributors
+
+| [![twitter/mathias](http://gravatar.com/avatar/24e08a9ea84deb17ae121074d0f17125?s=70)](https://twitter.com/mathias "Follow @mathias on Twitter") |
+|---|
+| [Mathias Bynens](http://mathiasbynens.be/) |
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsgen/package.json b/node_modules/css-selector-tokenizer/node_modules/regjsgen/package.json
new file mode 100644
index 00000000..92c68537
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsgen/package.json
@@ -0,0 +1,33 @@
+{

+  "name": "regjsgen",

+  "version": "0.2.0",

+  "description": "Generate `RegExp`s from RegJSParser’s AST",

+  "homepage": "https://github.com/d10/regjsgen",

+  "license": "MIT",

+  "main": "regjsgen.js",

+  "keywords": [

+    "ast",

+    "generate",

+    "regex",

+    "regexp",

+    "regular expressions"

+  ],

+  "author": "Benjamin Tan <demoneaux@gmail.com> (https://d10.github.io/)",

+  "contributors": [

+    "Benjamin Tan <demoneaux@gmail.com> (https://d10.github.io/)",

+    "Mathias Bynens <mathias@qiwi.be> (https://mathiasbynens.be/)"

+  ],

+  "repository": "d10/regjsgen",

+  "scripts": {

+    "test": "node test/test.js"

+  },

+  "files": [

+    "LICENSE.txt",

+    "regjsgen.js",

+    "README.md"

+  ],

+  "devDependencies": {

+    "got": "~1.2.0",

+    "jsesc": "~0.5.0"

+  }

+}

diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsgen/regjsgen.js b/node_modules/css-selector-tokenizer/node_modules/regjsgen/regjsgen.js
new file mode 100644
index 00000000..58ff1516
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsgen/regjsgen.js
@@ -0,0 +1,408 @@
+/*!
+ * RegJSGen
+ * Copyright 2014 Benjamin Tan <https://d10.github.io/>
+ * Available under MIT license <http://d10.mit-license.org/>
+ */
+;(function() {
+  'use strict';
+
+  /** Used to determine if values are of the language type `Object` */
+  var objectTypes = {
+    'function': true,
+    'object': true
+  };
+
+  /** Used as a reference to the global object */
+  var root = (objectTypes[typeof window] && window) || this;
+
+  /** Backup possible global object */
+  var oldRoot = root;
+
+  /** Detect free variable `exports` */
+  var freeExports = objectTypes[typeof exports] && exports;
+
+  /** Detect free variable `module` */
+  var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;
+
+  /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
+  var freeGlobal = freeExports && freeModule && typeof global == 'object' && global;
+  if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal || freeGlobal.self === freeGlobal)) {
+    root = freeGlobal;
+  }
+
+  /*--------------------------------------------------------------------------*/
+
+  /*! Based on https://mths.be/fromcodepoint v0.2.0 by @mathias */
+
+  var stringFromCharCode = String.fromCharCode;
+  var floor = Math.floor;
+  function fromCodePoint() {
+    var MAX_SIZE = 0x4000;
+    var codeUnits = [];
+    var highSurrogate;
+    var lowSurrogate;
+    var index = -1;
+    var length = arguments.length;
+    if (!length) {
+      return '';
+    }
+    var result = '';
+    while (++index < length) {
+      var codePoint = Number(arguments[index]);
+      if (
+        !isFinite(codePoint) || // `NaN`, `+Infinity`, or `-Infinity`
+        codePoint < 0 || // not a valid Unicode code point
+        codePoint > 0x10FFFF || // not a valid Unicode code point
+        floor(codePoint) != codePoint // not an integer
+      ) {
+        throw RangeError('Invalid code point: ' + codePoint);
+      }
+      if (codePoint <= 0xFFFF) {
+        // BMP code point
+        codeUnits.push(codePoint);
+      } else {
+        // Astral code point; split in surrogate halves
+        // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
+        codePoint -= 0x10000;
+        highSurrogate = (codePoint >> 10) + 0xD800;
+        lowSurrogate = (codePoint % 0x400) + 0xDC00;
+        codeUnits.push(highSurrogate, lowSurrogate);
+      }
+      if (index + 1 == length || codeUnits.length > MAX_SIZE) {
+        result += stringFromCharCode.apply(null, codeUnits);
+        codeUnits.length = 0;
+      }
+    }
+    return result;
+  }
+
+  function assertType(type, expected) {
+    if (expected.indexOf('|') == -1) {
+      if (type == expected) {
+        return;
+      }
+
+      throw Error('Invalid node type: ' + type);
+    }
+
+    expected = assertType.hasOwnProperty(expected)
+      ? assertType[expected]
+      : (assertType[expected] = RegExp('^(?:' + expected + ')$'));
+
+    if (expected.test(type)) {
+      return;
+    }
+
+    throw Error('Invalid node type: ' + type);
+  }
+
+  /*--------------------------------------------------------------------------*/
+
+  function generate(node) {
+    var type = node.type;
+
+    if (generate.hasOwnProperty(type) && typeof generate[type] == 'function') {
+      return generate[type](node);
+    }
+
+    throw Error('Invalid node type: ' + type);
+  }
+
+  /*--------------------------------------------------------------------------*/
+
+  function generateAlternative(node) {
+    assertType(node.type, 'alternative');
+
+    var terms = node.body,
+        length = terms ? terms.length : 0;
+
+    if (length == 1) {
+      return generateTerm(terms[0]);
+    } else {
+      var i = -1,
+          result = '';
+
+      while (++i < length) {
+        result += generateTerm(terms[i]);
+      }
+
+      return result;
+    }
+  }
+
+  function generateAnchor(node) {
+    assertType(node.type, 'anchor');
+
+    switch (node.kind) {
+      case 'start':
+        return '^';
+      case 'end':
+        return '$';
+      case 'boundary':
+        return '\\b';
+      case 'not-boundary':
+        return '\\B';
+      default:
+        throw Error('Invalid assertion');
+    }
+  }
+
+  function generateAtom(node) {
+    assertType(node.type, 'anchor|characterClass|characterClassEscape|dot|group|reference|value');
+
+    return generate(node);
+  }
+
+  function generateCharacterClass(node) {
+    assertType(node.type, 'characterClass');
+
+    var classRanges = node.body,
+        length = classRanges ? classRanges.length : 0;
+
+    var i = -1,
+        result = '[';
+
+    if (node.negative) {
+      result += '^';
+    }
+
+    while (++i < length) {
+      result += generateClassAtom(classRanges[i]);
+    }
+
+    result += ']';
+
+    return result;
+  }
+
+  function generateCharacterClassEscape(node) {
+    assertType(node.type, 'characterClassEscape');
+
+    return '\\' + node.value;
+  }
+
+  function generateCharacterClassRange(node) {
+    assertType(node.type, 'characterClassRange');
+
+    var min = node.min,
+        max = node.max;
+
+    if (min.type == 'characterClassRange' || max.type == 'characterClassRange') {
+      throw Error('Invalid character class range');
+    }
+
+    return generateClassAtom(min) + '-' + generateClassAtom(max);
+  }
+
+  function generateClassAtom(node) {
+    assertType(node.type, 'anchor|characterClassEscape|characterClassRange|dot|value');
+
+    return generate(node);
+  }
+
+  function generateDisjunction(node) {
+    assertType(node.type, 'disjunction');
+
+    var body = node.body,
+        length = body ? body.length : 0;
+
+    if (length == 0) {
+      throw Error('No body');
+    } else if (length == 1) {
+      return generate(body[0]);
+    } else {
+      var i = -1,
+          result = '';
+
+      while (++i < length) {
+        if (i != 0) {
+          result += '|';
+        }
+        result += generate(body[i]);
+      }
+
+      return result;
+    }
+  }
+
+  function generateDot(node) {
+    assertType(node.type, 'dot');
+
+    return '.';
+  }
+
+  function generateGroup(node) {
+    assertType(node.type, 'group');
+
+    var result = '(';
+
+    switch (node.behavior) {
+      case 'normal':
+        break;
+      case 'ignore':
+        result += '?:';
+        break;
+      case 'lookahead':
+        result += '?=';
+        break;
+      case 'negativeLookahead':
+        result += '?!';
+        break;
+      default:
+        throw Error('Invalid behaviour: ' + node.behaviour);
+    }
+
+    var body = node.body,
+        length = body ? body.length : 0;
+
+    if (length == 1) {
+      result += generate(body[0]);
+    } else {
+      var i = -1;
+
+      while (++i < length) {
+        result += generate(body[i]);
+      }
+    }
+
+    result += ')';
+
+    return result;
+  }
+
+  function generateQuantifier(node) {
+    assertType(node.type, 'quantifier');
+
+    var quantifier = '',
+        min = node.min,
+        max = node.max;
+
+    switch (max) {
+      case undefined:
+      case null:
+        switch (min) {
+          case 0:
+            quantifier = '*'
+            break;
+          case 1:
+            quantifier = '+';
+            break;
+          default:
+            quantifier = '{' + min + ',}';
+            break;
+        }
+        break;
+      default:
+        if (min == max) {
+          quantifier = '{' + min + '}';
+        }
+        else if (min == 0 && max == 1) {
+          quantifier = '?';
+        } else {
+          quantifier = '{' + min + ',' + max + '}';
+        }
+        break;
+    }
+
+    if (!node.greedy) {
+      quantifier += '?';
+    }
+
+    return generateAtom(node.body[0]) + quantifier;
+  }
+
+  function generateReference(node) {
+    assertType(node.type, 'reference');
+
+    return '\\' + node.matchIndex;
+  }
+
+  function generateTerm(node) {
+    assertType(node.type, 'anchor|characterClass|characterClassEscape|empty|group|quantifier|reference|value');
+
+    return generate(node);
+  }
+
+  function generateValue(node) {
+    assertType(node.type, 'value');
+
+    var kind = node.kind,
+        codePoint = node.codePoint;
+
+    switch (kind) {
+      case 'controlLetter':
+        return '\\c' + fromCodePoint(codePoint + 64);
+      case 'hexadecimalEscape':
+        return '\\x' + ('00' + codePoint.toString(16).toUpperCase()).slice(-2);
+      case 'identifier':
+        return '\\' + fromCodePoint(codePoint);
+      case 'null':
+        return '\\' + codePoint;
+      case 'octal':
+        return '\\' + codePoint.toString(8);
+      case 'singleEscape':
+        switch (codePoint) {
+          case 0x0008:
+            return '\\b';
+          case 0x009:
+            return '\\t';
+          case 0x00A:
+            return '\\n';
+          case 0x00B:
+            return '\\v';
+          case 0x00C:
+            return '\\f';
+          case 0x00D:
+            return '\\r';
+          default:
+            throw Error('Invalid codepoint: ' + codePoint);
+        }
+      case 'symbol':
+        return fromCodePoint(codePoint);
+      case 'unicodeEscape':
+        return '\\u' + ('0000' + codePoint.toString(16).toUpperCase()).slice(-4);
+      case 'unicodeCodePointEscape':
+        return '\\u{' + codePoint.toString(16).toUpperCase() + '}';
+      default:
+        throw Error('Unsupported node kind: ' + kind);
+    }
+  }
+
+  /*--------------------------------------------------------------------------*/
+
+  generate.alternative = generateAlternative;
+  generate.anchor = generateAnchor;
+  generate.characterClass = generateCharacterClass;
+  generate.characterClassEscape = generateCharacterClassEscape;
+  generate.characterClassRange = generateCharacterClassRange;
+  generate.disjunction = generateDisjunction;
+  generate.dot = generateDot;
+  generate.group = generateGroup;
+  generate.quantifier = generateQuantifier;
+  generate.reference = generateReference;
+  generate.value = generateValue;
+
+  /*--------------------------------------------------------------------------*/
+
+  // export regjsgen
+  // some AMD build optimizers, like r.js, check for condition patterns like the following:
+  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
+    // define as an anonymous module so, through path mapping, it can be aliased
+    define(function() {
+      return {
+        'generate': generate
+      };
+    });
+  }
+  // check for `exports` after `define` in case a build optimizer adds an `exports` object
+  else if (freeExports && freeModule) {
+    // in Narwhal, Node.js, Rhino -require, or RingoJS
+    freeExports.generate = generate;
+  }
+  // in a browser or Rhino
+  else {
+    root.regjsgen = {
+      'generate': generate
+    };
+  }
+}.call(this));
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsparser/.bin/regjsparser b/node_modules/css-selector-tokenizer/node_modules/regjsparser/.bin/regjsparser
new file mode 120000
index 00000000..00a39d45
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsparser/.bin/regjsparser
@@ -0,0 +1 @@
+../bin/parser
\ No newline at end of file
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsparser/CHANGELOG b/node_modules/css-selector-tokenizer/node_modules/regjsparser/CHANGELOG
new file mode 100644
index 00000000..d2fe483e
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsparser/CHANGELOG
@@ -0,0 +1,12 @@
+2014-08-31: Version 0.1.2
+  * Change the field ref to matchIndex on the type=refernce node (issue #67)
+
+2014-08-30: Version 0.1.1
+  * Only handled unicode code point escapes if 'u' flag is set (issue #56)
+  * Removed `matchIdx` from the AST
+  * References like /\1/ were broken (issue #57)
+  * Renamed type `ref` to `reference` in the AST
+  * Update regex to match identifier and include script to generate regex
+
+2014-06-29: Version 0.1.0
+  * first tagged release
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsparser/LICENSE.BSD b/node_modules/css-selector-tokenizer/node_modules/regjsparser/LICENSE.BSD
new file mode 100644
index 00000000..3e580c35
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsparser/LICENSE.BSD
@@ -0,0 +1,19 @@
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsparser/README.md b/node_modules/css-selector-tokenizer/node_modules/regjsparser/README.md
new file mode 100644
index 00000000..83f67e90
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsparser/README.md
@@ -0,0 +1,34 @@
+# RegJSParser
+
+Parsing the JavaScript's RegExp in JavaScript.
+
+## Installation
+
+```bash
+npm install regjsparser
+```
+
+## Usage
+
+```js
+var parse = require('regjsparser').parse;
+
+var parseTree = parse('^a'); // /^a/
+console.log(parseTree);
+```
+
+## Testing
+
+To run the tests, run the following command:
+
+```bash
+npm test
+```
+
+To create a new reference file, execute…
+
+```bash
+node test/update-fixtures.js
+```
+
+…from the repo top directory.
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsparser/bin/parser b/node_modules/css-selector-tokenizer/node_modules/regjsparser/bin/parser
new file mode 100755
index 00000000..09a60369
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsparser/bin/parser
@@ -0,0 +1,50 @@
+#!/usr/bin/env node
+(function() {
+
+  var fs = require('fs');
+  var parse = require('../parser').parse;
+  var jsesc = require('jsesc');
+  var regexes = process.argv.splice(2);
+  var first = regexes[0];
+  var data;
+  var log = console.log;
+  var main = function() {
+    if (/^(?:-h|--help|undefined)$/.test(first)) {
+      log([
+        '\nUsage:\n',
+        '\tregjsparser [regex ...]',
+        '\tregjsparser [-h | --help]',
+        '\nExamples:\n',
+        '\tregjsparser \'^foo.bar$\'',
+        '\tregjsparser \'[a-zA-Z0-9]\''
+      ].join('\n'));
+      return process.exit(1);
+    }
+
+    regexes.forEach(function(snippet) {
+      var result;
+      try {
+        result = parse(snippet);
+        log(jsesc(result, {
+          'json': true,
+          'compact': false,
+          'indent': '\t'
+        }));
+      } catch(error) {
+        log(error.message + '\n');
+        log('Error: failed to parse. Make sure the regular expression is valid.');
+        log('If you think this is a bug in regjsparser, please report it:');
+        log('\thttps://github.com/jviereck/regjsparser/issues/new');
+        log('\nStack trace:\n');
+        log(error.stack);
+        return process.exit(1);
+      }
+    });
+    // Return with exit status 0 outside of the `forEach` loop, in case
+    // multiple regular expressions were passed in.
+    return process.exit(0);
+  };
+
+  main();
+
+}());
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsparser/node_modules/.bin/jsesc b/node_modules/css-selector-tokenizer/node_modules/regjsparser/node_modules/.bin/jsesc
new file mode 120000
index 00000000..ef632e56
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsparser/node_modules/.bin/jsesc
@@ -0,0 +1 @@
+../../../../../jsesc/bin/jsesc
\ No newline at end of file
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsparser/package.json b/node_modules/css-selector-tokenizer/node_modules/regjsparser/package.json
new file mode 100644
index 00000000..5c5e65f8
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsparser/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "regjsparser",
+  "version": "0.1.5",
+  "author": "'Julian Viereck' <julian.viereck@gmail.com>",
+  "license": "BSD",
+  "main": "./parser",
+  "bin": "bin/parser",
+  "homepage": "https://github.com/jviereck/regjsparser",
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:jviereck/regjsparser.git"
+  },
+  "scripts": {
+    "test": "node test/index.js"
+  },
+  "files": [
+    "bin/",
+    "LICENSE.BSD",
+    "parser.js",
+    "README.md"
+  ],
+  "dependencies": {
+    "jsesc": "~0.5.0"
+  },
+  "devDependencies": {
+    "regenerate": "~1.0.1",
+    "unicode-7.0.0": "~0.1.5"
+  }
+}
diff --git a/node_modules/css-selector-tokenizer/node_modules/regjsparser/parser.js b/node_modules/css-selector-tokenizer/node_modules/regjsparser/parser.js
new file mode 100644
index 00000000..ae414a3d
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/node_modules/regjsparser/parser.js
@@ -0,0 +1,962 @@
+// regjsparser
+//
+// ==================================================================
+//
+// See ECMA-262 Standard: 15.10.1
+//
+// NOTE: The ECMA-262 standard uses the term "Assertion" for /^/. Here the
+//   term "Anchor" is used.
+//
+// Pattern ::
+//      Disjunction
+//
+// Disjunction ::
+//      Alternative
+//      Alternative | Disjunction
+//
+// Alternative ::
+//      [empty]
+//      Alternative Term
+//
+// Term ::
+//      Anchor
+//      Atom
+//      Atom Quantifier
+//
+// Anchor ::
+//      ^
+//      $
+//      \ b
+//      \ B
+//      ( ? = Disjunction )
+//      ( ? ! Disjunction )
+//
+// Quantifier ::
+//      QuantifierPrefix
+//      QuantifierPrefix ?
+//
+// QuantifierPrefix ::
+//      *
+//      +
+//      ?
+//      { DecimalDigits }
+//      { DecimalDigits , }
+//      { DecimalDigits , DecimalDigits }
+//
+// Atom ::
+//      PatternCharacter
+//      .
+//      \ AtomEscape
+//      CharacterClass
+//      ( Disjunction )
+//      ( ? : Disjunction )
+//
+// PatternCharacter ::
+//      SourceCharacter but not any of: ^ $ \ . * + ? ( ) [ ] { } |
+//
+// AtomEscape ::
+//      DecimalEscape
+//      CharacterEscape
+//      CharacterClassEscape
+//
+// CharacterEscape[U] ::
+//      ControlEscape
+//      c ControlLetter
+//      HexEscapeSequence
+//      RegExpUnicodeEscapeSequence[?U] (ES6)
+//      IdentityEscape[?U]
+//
+// ControlEscape ::
+//      one of f n r t v
+// ControlLetter ::
+//      one of
+//          a b c d e f g h i j k l m n o p q r s t u v w x y z
+//          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
+//
+// IdentityEscape ::
+//      SourceCharacter but not IdentifierPart
+//      <ZWJ>
+//      <ZWNJ>
+//
+// DecimalEscape ::
+//      DecimalIntegerLiteral [lookahead ∉ DecimalDigit]
+//
+// CharacterClassEscape ::
+//      one of d D s S w W
+//
+// CharacterClass ::
+//      [ [lookahead ∉ {^}] ClassRanges ]
+//      [ ^ ClassRanges ]
+//
+// ClassRanges ::
+//      [empty]
+//      NonemptyClassRanges
+//
+// NonemptyClassRanges ::
+//      ClassAtom
+//      ClassAtom NonemptyClassRangesNoDash
+//      ClassAtom - ClassAtom ClassRanges
+//
+// NonemptyClassRangesNoDash ::
+//      ClassAtom
+//      ClassAtomNoDash NonemptyClassRangesNoDash
+//      ClassAtomNoDash - ClassAtom ClassRanges
+//
+// ClassAtom ::
+//      -
+//      ClassAtomNoDash
+//
+// ClassAtomNoDash ::
+//      SourceCharacter but not one of \ or ] or -
+//      \ ClassEscape
+//
+// ClassEscape ::
+//      DecimalEscape
+//      b
+//      CharacterEscape
+//      CharacterClassEscape
+
+(function() {
+
+  function parse(str, flags) {
+    function addRaw(node) {
+      node.raw = str.substring(node.range[0], node.range[1]);
+      return node;
+    }
+
+    function updateRawStart(node, start) {
+      node.range[0] = start;
+      return addRaw(node);
+    }
+
+    function createAnchor(kind, rawLength) {
+      return addRaw({
+        type: 'anchor',
+        kind: kind,
+        range: [
+          pos - rawLength,
+          pos
+        ]
+      });
+    }
+
+    function createValue(kind, codePoint, from, to) {
+      return addRaw({
+        type: 'value',
+        kind: kind,
+        codePoint: codePoint,
+        range: [from, to]
+      });
+    }
+
+    function createEscaped(kind, codePoint, value, fromOffset) {
+      fromOffset = fromOffset || 0;
+      return createValue(kind, codePoint, pos - (value.length + fromOffset), pos);
+    }
+
+    function createCharacter(matches) {
+      var _char = matches[0];
+      var first = _char.charCodeAt(0);
+      if (hasUnicodeFlag) {
+        var second;
+        if (_char.length === 1 && first >= 0xD800 && first <= 0xDBFF) {
+          second = lookahead().charCodeAt(0);
+          if (second >= 0xDC00 && second <= 0xDFFF) {
+            // Unicode surrogate pair
+            pos++;
+            return createValue(
+                'symbol',
+                (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000,
+                pos - 2, pos);
+          }
+        }
+      }
+      return createValue('symbol', first, pos - 1, pos);
+    }
+
+    function createDisjunction(alternatives, from, to) {
+      return addRaw({
+        type: 'disjunction',
+        body: alternatives,
+        range: [
+          from,
+          to
+        ]
+      });
+    }
+
+    function createDot() {
+      return addRaw({
+        type: 'dot',
+        range: [
+          pos - 1,
+          pos
+        ]
+      });
+    }
+
+    function createCharacterClassEscape(value) {
+      return addRaw({
+        type: 'characterClassEscape',
+        value: value,
+        range: [
+          pos - 2,
+          pos
+        ]
+      });
+    }
+
+    function createReference(matchIndex) {
+      return addRaw({
+        type: 'reference',
+        matchIndex: parseInt(matchIndex, 10),
+        range: [
+          pos - 1 - matchIndex.length,
+          pos
+        ]
+      });
+    }
+
+    function createGroup(behavior, disjunction, from, to) {
+      return addRaw({
+        type: 'group',
+        behavior: behavior,
+        body: disjunction,
+        range: [
+          from,
+          to
+        ]
+      });
+    }
+
+    function createQuantifier(min, max, from, to) {
+      if (to == null) {
+        from = pos - 1;
+        to = pos;
+      }
+
+      return addRaw({
+        type: 'quantifier',
+        min: min,
+        max: max,
+        greedy: true,
+        body: null, // set later on
+        range: [
+          from,
+          to
+        ]
+      });
+    }
+
+    function createAlternative(terms, from, to) {
+      return addRaw({
+        type: 'alternative',
+        body: terms,
+        range: [
+          from,
+          to
+        ]
+      });
+    }
+
+    function createCharacterClass(classRanges, negative, from, to) {
+      return addRaw({
+        type: 'characterClass',
+        body: classRanges,
+        negative: negative,
+        range: [
+          from,
+          to
+        ]
+      });
+    }
+
+    function createClassRange(min, max, from, to) {
+      // See 15.10.2.15:
+      if (min.codePoint > max.codePoint) {
+        bail('invalid range in character class', min.raw + '-' + max.raw, from, to);
+      }
+
+      return addRaw({
+        type: 'characterClassRange',
+        min: min,
+        max: max,
+        range: [
+          from,
+          to
+        ]
+      });
+    }
+
+    function flattenBody(body) {
+      if (body.type === 'alternative') {
+        return body.body;
+      } else {
+        return [body];
+      }
+    }
+
+    function isEmpty(obj) {
+      return obj.type === 'empty';
+    }
+
+    function incr(amount) {
+      amount = (amount || 1);
+      var res = str.substring(pos, pos + amount);
+      pos += (amount || 1);
+      return res;
+    }
+
+    function skip(value) {
+      if (!match(value)) {
+        bail('character', value);
+      }
+    }
+
+    function match(value) {
+      if (str.indexOf(value, pos) === pos) {
+        return incr(value.length);
+      }
+    }
+
+    function lookahead() {
+      return str[pos];
+    }
+
+    function current(value) {
+      return str.indexOf(value, pos) === pos;
+    }
+
+    function next(value) {
+      return str[pos + 1] === value;
+    }
+
+    function matchReg(regExp) {
+      var subStr = str.substring(pos);
+      var res = subStr.match(regExp);
+      if (res) {
+        res.range = [];
+        res.range[0] = pos;
+        incr(res[0].length);
+        res.range[1] = pos;
+      }
+      return res;
+    }
+
+    function parseDisjunction() {
+      // Disjunction ::
+      //      Alternative
+      //      Alternative | Disjunction
+      var res = [], from = pos;
+      res.push(parseAlternative());
+
+      while (match('|')) {
+        res.push(parseAlternative());
+      }
+
+      if (res.length === 1) {
+        return res[0];
+      }
+
+      return createDisjunction(res, from, pos);
+    }
+
+    function parseAlternative() {
+      var res = [], from = pos;
+      var term;
+
+      // Alternative ::
+      //      [empty]
+      //      Alternative Term
+      while (term = parseTerm()) {
+        res.push(term);
+      }
+
+      if (res.length === 1) {
+        return res[0];
+      }
+
+      return createAlternative(res, from, pos);
+    }
+
+    function parseTerm() {
+      // Term ::
+      //      Anchor
+      //      Atom
+      //      Atom Quantifier
+
+      if (pos >= str.length || current('|') || current(')')) {
+        return null; /* Means: The term is empty */
+      }
+
+      var anchor = parseAnchor();
+
+      if (anchor) {
+        return anchor;
+      }
+
+      var atom = parseAtom();
+      if (!atom) {
+        bail('Expected atom');
+      }
+      var quantifier = parseQuantifier() || false;
+      if (quantifier) {
+        quantifier.body = flattenBody(atom);
+        // The quantifier contains the atom. Therefore, the beginning of the
+        // quantifier range is given by the beginning of the atom.
+        updateRawStart(quantifier, atom.range[0]);
+        return quantifier;
+      }
+      return atom;
+    }
+
+    function parseGroup(matchA, typeA, matchB, typeB) {
+      var type = null, from = pos;
+
+      if (match(matchA)) {
+        type = typeA;
+      } else if (match(matchB)) {
+        type = typeB;
+      } else {
+        return false;
+      }
+
+      var body = parseDisjunction();
+      if (!body) {
+        bail('Expected disjunction');
+      }
+      skip(')');
+      var group = createGroup(type, flattenBody(body), from, pos);
+
+      if (type == 'normal') {
+        // Keep track of the number of closed groups. This is required for
+        // parseDecimalEscape(). In case the string is parsed a second time the
+        // value already holds the total count and no incrementation is required.
+        if (firstIteration) {
+          closedCaptureCounter++;
+        }
+      }
+      return group;
+    }
+
+    function parseAnchor() {
+      // Anchor ::
+      //      ^
+      //      $
+      //      \ b
+      //      \ B
+      //      ( ? = Disjunction )
+      //      ( ? ! Disjunction )
+      var res, from = pos;
+
+      if (match('^')) {
+        return createAnchor('start', 1 /* rawLength */);
+      } else if (match('$')) {
+        return createAnchor('end', 1 /* rawLength */);
+      } else if (match('\\b')) {
+        return createAnchor('boundary', 2 /* rawLength */);
+      } else if (match('\\B')) {
+        return createAnchor('not-boundary', 2 /* rawLength */);
+      } else {
+        return parseGroup('(?=', 'lookahead', '(?!', 'negativeLookahead');
+      }
+    }
+
+    function parseQuantifier() {
+      // Quantifier ::
+      //      QuantifierPrefix
+      //      QuantifierPrefix ?
+      //
+      // QuantifierPrefix ::
+      //      *
+      //      +
+      //      ?
+      //      { DecimalDigits }
+      //      { DecimalDigits , }
+      //      { DecimalDigits , DecimalDigits }
+
+      var res, from = pos;
+      var quantifier;
+      var min, max;
+
+      if (match('*')) {
+        quantifier = createQuantifier(0);
+      }
+      else if (match('+')) {
+        quantifier = createQuantifier(1);
+      }
+      else if (match('?')) {
+        quantifier = createQuantifier(0, 1);
+      }
+      else if (res = matchReg(/^\{([0-9]+)\}/)) {
+        min = parseInt(res[1], 10);
+        quantifier = createQuantifier(min, min, res.range[0], res.range[1]);
+      }
+      else if (res = matchReg(/^\{([0-9]+),\}/)) {
+        min = parseInt(res[1], 10);
+        quantifier = createQuantifier(min, undefined, res.range[0], res.range[1]);
+      }
+      else if (res = matchReg(/^\{([0-9]+),([0-9]+)\}/)) {
+        min = parseInt(res[1], 10);
+        max = parseInt(res[2], 10);
+        if (min > max) {
+          bail('numbers out of order in {} quantifier', '', from, pos);
+        }
+        quantifier = createQuantifier(min, max, res.range[0], res.range[1]);
+      }
+
+      if (quantifier) {
+        if (match('?')) {
+          quantifier.greedy = false;
+          quantifier.range[1] += 1;
+        }
+      }
+
+      return quantifier;
+    }
+
+    function parseAtom() {
+      // Atom ::
+      //      PatternCharacter
+      //      .
+      //      \ AtomEscape
+      //      CharacterClass
+      //      ( Disjunction )
+      //      ( ? : Disjunction )
+
+      var res;
+
+      // jviereck: allow ']', '}' here as well to be compatible with browser's
+      //   implementations: ']'.match(/]/);
+      // if (res = matchReg(/^[^^$\\.*+?()[\]{}|]/)) {
+      if (res = matchReg(/^[^^$\\.*+?(){[|]/)) {
+        //      PatternCharacter
+        return createCharacter(res);
+      }
+      else if (match('.')) {
+        //      .
+        return createDot();
+      }
+      else if (match('\\')) {
+        //      \ AtomEscape
+        res = parseAtomEscape();
+        if (!res) {
+          bail('atomEscape');
+        }
+        return res;
+      }
+      else if (res = parseCharacterClass()) {
+        return res;
+      }
+      else {
+        //      ( Disjunction )
+        //      ( ? : Disjunction )
+        return parseGroup('(?:', 'ignore', '(', 'normal');
+      }
+    }
+
+    function parseUnicodeSurrogatePairEscape(firstEscape) {
+      if (hasUnicodeFlag) {
+        var first, second;
+        if (firstEscape.kind == 'unicodeEscape' &&
+          (first = firstEscape.codePoint) >= 0xD800 && first <= 0xDBFF &&
+          current('\\') && next('u') ) {
+          var prevPos = pos;
+          pos++;
+          var secondEscape = parseClassEscape();
+          if (secondEscape.kind == 'unicodeEscape' &&
+            (second = secondEscape.codePoint) >= 0xDC00 && second <= 0xDFFF) {
+            // Unicode surrogate pair
+            firstEscape.range[1] = secondEscape.range[1];
+            firstEscape.codePoint = (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
+            firstEscape.type = 'value';
+            firstEscape.kind = 'unicodeCodePointEscape';
+            addRaw(firstEscape);
+          }
+          else {
+            pos = prevPos;
+          }
+        }
+      }
+      return firstEscape;
+    }
+
+    function parseClassEscape() {
+      return parseAtomEscape(true);
+    }
+
+    function parseAtomEscape(insideCharacterClass) {
+      // AtomEscape ::
+      //      DecimalEscape
+      //      CharacterEscape
+      //      CharacterClassEscape
+
+      var res, from = pos;
+
+      res = parseDecimalEscape();
+      if (res) {
+        return res;
+      }
+
+      // For ClassEscape
+      if (insideCharacterClass) {
+        if (match('b')) {
+          // 15.10.2.19
+          // The production ClassEscape :: b evaluates by returning the
+          // CharSet containing the one character <BS> (Unicode value 0008).
+          return createEscaped('singleEscape', 0x0008, '\\b');
+        } else if (match('B')) {
+          bail('\\B not possible inside of CharacterClass', '', from);
+        }
+      }
+
+      res = parseCharacterEscape();
+
+      return res;
+    }
+
+
+    function parseDecimalEscape() {
+      // DecimalEscape ::
+      //      DecimalIntegerLiteral [lookahead ∉ DecimalDigit]
+      //      CharacterClassEscape :: one of d D s S w W
+
+      var res, match;
+
+      if (res = matchReg(/^(?!0)\d+/)) {
+        match = res[0];
+        var refIdx = parseInt(res[0], 10);
+        if (refIdx <= closedCaptureCounter) {
+          // If the number is smaller than the normal-groups found so
+          // far, then it is a reference...
+          return createReference(res[0]);
+        } else {
+          // ... otherwise it needs to be interpreted as a octal (if the
+          // number is in an octal format). If it is NOT octal format,
+          // then the slash is ignored and the number is matched later
+          // as normal characters.
+
+          // Recall the negative decision to decide if the input must be parsed
+          // a second time with the total normal-groups.
+          backrefDenied.push(refIdx);
+
+          // Reset the position again, as maybe only parts of the previous
+          // matched numbers are actual octal numbers. E.g. in '019' only
+          // the '01' should be matched.
+          incr(-res[0].length);
+          if (res = matchReg(/^[0-7]{1,3}/)) {
+            return createEscaped('octal', parseInt(res[0], 8), res[0], 1);
+          } else {
+            // If we end up here, we have a case like /\91/. Then the
+            // first slash is to be ignored and the 9 & 1 to be treated
+            // like ordinary characters. Create a character for the
+            // first number only here - other number-characters
+            // (if available) will be matched later.
+            res = createCharacter(matchReg(/^[89]/));
+            return updateRawStart(res, res.range[0] - 1);
+          }
+        }
+      }
+      // Only allow octal numbers in the following. All matched numbers start
+      // with a zero (if the do not, the previous if-branch is executed).
+      // If the number is not octal format and starts with zero (e.g. `091`)
+      // then only the zeros `0` is treated here and the `91` are ordinary
+      // characters.
+      // Example:
+      //   /\091/.exec('\091')[0].length === 3
+      else if (res = matchReg(/^[0-7]{1,3}/)) {
+        match = res[0];
+        if (/^0{1,3}$/.test(match)) {
+          // If they are all zeros, then only take the first one.
+          return createEscaped('null', 0x0000, '0', match.length + 1);
+        } else {
+          return createEscaped('octal', parseInt(match, 8), match, 1);
+        }
+      } else if (res = matchReg(/^[dDsSwW]/)) {
+        return createCharacterClassEscape(res[0]);
+      }
+      return false;
+    }
+
+    function parseCharacterEscape() {
+      // CharacterEscape ::
+      //      ControlEscape
+      //      c ControlLetter
+      //      HexEscapeSequence
+      //      UnicodeEscapeSequence
+      //      IdentityEscape
+
+      var res;
+      if (res = matchReg(/^[fnrtv]/)) {
+        // ControlEscape
+        var codePoint = 0;
+        switch (res[0]) {
+          case 't': codePoint = 0x009; break;
+          case 'n': codePoint = 0x00A; break;
+          case 'v': codePoint = 0x00B; break;
+          case 'f': codePoint = 0x00C; break;
+          case 'r': codePoint = 0x00D; break;
+        }
+        return createEscaped('singleEscape', codePoint, '\\' + res[0]);
+      } else if (res = matchReg(/^c([a-zA-Z])/)) {
+        // c ControlLetter
+        return createEscaped('controlLetter', res[1].charCodeAt(0) % 32, res[1], 2);
+      } else if (res = matchReg(/^x([0-9a-fA-F]{2})/)) {
+        // HexEscapeSequence
+        return createEscaped('hexadecimalEscape', parseInt(res[1], 16), res[1], 2);
+      } else if (res = matchReg(/^u([0-9a-fA-F]{4})/)) {
+        // UnicodeEscapeSequence
+        return parseUnicodeSurrogatePairEscape(
+          createEscaped('unicodeEscape', parseInt(res[1], 16), res[1], 2)
+        );
+      } else if (hasUnicodeFlag && (res = matchReg(/^u\{([0-9a-fA-F]+)\}/))) {
+        // RegExpUnicodeEscapeSequence (ES6 Unicode code point escape)
+        return createEscaped('unicodeCodePointEscape', parseInt(res[1], 16), res[1], 4);
+      } else {
+        // IdentityEscape
+        return parseIdentityEscape();
+      }
+    }
+
+    // Taken from the Esprima parser.
+    function isIdentifierPart(ch) {
+      // Generated by `tools/generate-identifier-regex.js`.
+      var NonAsciiIdentifierPart = new RegExp('[\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0300-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u05D0-\u05EA\u05F0-\u05F2\u0610-\u061A\u0620-\u0669\u066E-\u06D3\u06D5-\u06DC\u06DF-\u06E8\u06EA-\u06FC\u06FF\u0710-\u074A\u074D-\u07B1\u07C0-\u07F5\u07FA\u0800-\u082D\u0840-\u085B\u08A0-\u08B2\u08E4-\u0963\u0966-\u096F\u0971-\u0983\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BC-\u09C4\u09C7\u09C8\u09CB-\u09CE\u09D7\u09DC\u09DD\u09DF-\u09E3\u09E6-\u09F1\u0A01-\u0A03\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A59-\u0A5C\u0A5E\u0A66-\u0A75\u0A81-\u0A83\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABC-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AD0\u0AE0-\u0AE3\u0AE6-\u0AEF\u0B01-\u0B03\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3C-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B5C\u0B5D\u0B5F-\u0B63\u0B66-\u0B6F\u0B71\u0B82\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD0\u0BD7\u0BE6-\u0BEF\u0C00-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58\u0C59\u0C60-\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBC-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CDE\u0CE0-\u0CE3\u0CE6-\u0CEF\u0CF1\u0CF2\u0D01-\u0D03\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D-\u0D44\u0D46-\u0D48\u0D4A-\u0D4E\u0D57\u0D60-\u0D63\u0D66-\u0D6F\u0D7A-\u0D7F\u0D82\u0D83\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E01-\u0E3A\u0E40-\u0E4E\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB9\u0EBB-\u0EBD\u0EC0-\u0EC4\u0EC6\u0EC8-\u0ECD\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E-\u0F47\u0F49-\u0F6C\u0F71-\u0F84\u0F86-\u0F97\u0F99-\u0FBC\u0FC6\u1000-\u1049\u1050-\u109D\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u135D-\u135F\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772\u1773\u1780-\u17D3\u17D7\u17DC\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u1820-\u1877\u1880-\u18AA\u18B0-\u18F5\u1900-\u191E\u1920-\u192B\u1930-\u193B\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19D9\u1A00-\u1A1B\u1A20-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AA7\u1AB0-\u1ABD\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1CF8\u1CF9\u1D00-\u1DF5\u1DFC-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u200C\u200D\u203F\u2040\u2054\u2071\u207F\u2090-\u209C\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u2E2F\u3005-\u3007\u3021-\u302F\u3031-\u3035\u3038-\u303C\u3041-\u3096\u3099\u309A\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA674-\uA67D\uA67F-\uA69D\uA69F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA7AD\uA7B0\uA7B1\uA7F7-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uA9E0-\uA9FE\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB5F\uAB64\uAB65\uABC0-\uABEA\uABEC\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE00-\uFE0F\uFE20-\uFE2D\uFE33\uFE34\uFE4D-\uFE4F\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]');
+
+      return (ch === 36) || (ch === 95) ||  // $ (dollar) and _ (underscore)
+        (ch >= 65 && ch <= 90) ||         // A..Z
+        (ch >= 97 && ch <= 122) ||        // a..z
+        (ch >= 48 && ch <= 57) ||         // 0..9
+        (ch === 92) ||                    // \ (backslash)
+        ((ch >= 0x80) && NonAsciiIdentifierPart.test(String.fromCharCode(ch)));
+    }
+
+    function parseIdentityEscape() {
+      // IdentityEscape ::
+      //      SourceCharacter but not IdentifierPart
+      //      <ZWJ>
+      //      <ZWNJ>
+
+      var ZWJ = '\u200C';
+      var ZWNJ = '\u200D';
+
+      var tmp;
+
+      if (!isIdentifierPart(lookahead())) {
+        tmp = incr();
+        return createEscaped('identifier', tmp.charCodeAt(0), tmp, 1);
+      }
+
+      if (match(ZWJ)) {
+        // <ZWJ>
+        return createEscaped('identifier', 0x200C, ZWJ);
+      } else if (match(ZWNJ)) {
+        // <ZWNJ>
+        return createEscaped('identifier', 0x200D, ZWNJ);
+      }
+
+      return null;
+    }
+
+    function parseCharacterClass() {
+      // CharacterClass ::
+      //      [ [lookahead ∉ {^}] ClassRanges ]
+      //      [ ^ ClassRanges ]
+
+      var res, from = pos;
+      if (res = matchReg(/^\[\^/)) {
+        res = parseClassRanges();
+        skip(']');
+        return createCharacterClass(res, true, from, pos);
+      } else if (match('[')) {
+        res = parseClassRanges();
+        skip(']');
+        return createCharacterClass(res, false, from, pos);
+      }
+
+      return null;
+    }
+
+    function parseClassRanges() {
+      // ClassRanges ::
+      //      [empty]
+      //      NonemptyClassRanges
+
+      var res;
+      if (current(']')) {
+        // Empty array means nothing insinde of the ClassRange.
+        return [];
+      } else {
+        res = parseNonemptyClassRanges();
+        if (!res) {
+          bail('nonEmptyClassRanges');
+        }
+        return res;
+      }
+    }
+
+    function parseHelperClassRanges(atom) {
+      var from, to, res;
+      if (current('-') && !next(']')) {
+        // ClassAtom - ClassAtom ClassRanges
+        skip('-');
+
+        res = parseClassAtom();
+        if (!res) {
+          bail('classAtom');
+        }
+        to = pos;
+        var classRanges = parseClassRanges();
+        if (!classRanges) {
+          bail('classRanges');
+        }
+        from = atom.range[0];
+        if (classRanges.type === 'empty') {
+          return [createClassRange(atom, res, from, to)];
+        }
+        return [createClassRange(atom, res, from, to)].concat(classRanges);
+      }
+
+      res = parseNonemptyClassRangesNoDash();
+      if (!res) {
+        bail('nonEmptyClassRangesNoDash');
+      }
+
+      return [atom].concat(res);
+    }
+
+    function parseNonemptyClassRanges() {
+      // NonemptyClassRanges ::
+      //      ClassAtom
+      //      ClassAtom NonemptyClassRangesNoDash
+      //      ClassAtom - ClassAtom ClassRanges
+
+      var atom = parseClassAtom();
+      if (!atom) {
+        bail('classAtom');
+      }
+
+      if (current(']')) {
+        // ClassAtom
+        return [atom];
+      }
+
+      // ClassAtom NonemptyClassRangesNoDash
+      // ClassAtom - ClassAtom ClassRanges
+      return parseHelperClassRanges(atom);
+    }
+
+    function parseNonemptyClassRangesNoDash() {
+      // NonemptyClassRangesNoDash ::
+      //      ClassAtom
+      //      ClassAtomNoDash NonemptyClassRangesNoDash
+      //      ClassAtomNoDash - ClassAtom ClassRanges
+
+      var res = parseClassAtom();
+      if (!res) {
+        bail('classAtom');
+      }
+      if (current(']')) {
+        //      ClassAtom
+        return res;
+      }
+
+      // ClassAtomNoDash NonemptyClassRangesNoDash
+      // ClassAtomNoDash - ClassAtom ClassRanges
+      return parseHelperClassRanges(res);
+    }
+
+    function parseClassAtom() {
+      // ClassAtom ::
+      //      -
+      //      ClassAtomNoDash
+      if (match('-')) {
+        return createCharacter('-');
+      } else {
+        return parseClassAtomNoDash();
+      }
+    }
+
+    function parseClassAtomNoDash() {
+      // ClassAtomNoDash ::
+      //      SourceCharacter but not one of \ or ] or -
+      //      \ ClassEscape
+
+      var res;
+      if (res = matchReg(/^[^\\\]-]/)) {
+        return createCharacter(res[0]);
+      } else if (match('\\')) {
+        res = parseClassEscape();
+        if (!res) {
+          bail('classEscape');
+        }
+
+        return parseUnicodeSurrogatePairEscape(res);
+      }
+    }
+
+    function bail(message, details, from, to) {
+      from = from == null ? pos : from;
+      to = to == null ? from : to;
+
+      var contextStart = Math.max(0, from - 10);
+      var contextEnd = Math.min(to + 10, str.length);
+
+      // Output a bit of context and a line pointing to where our error is.
+      //
+      // We are assuming that there are no actual newlines in the content as this is a regular expression.
+      var context = '    ' + str.substring(contextStart, contextEnd);
+      var pointer = '    ' + new Array(from - contextStart + 1).join(' ') + '^';
+
+      throw SyntaxError(message + ' at position ' + from + (details ? ': ' + details : '') + '\n' + context + '\n' + pointer);
+    }
+
+    var backrefDenied = [];
+    var closedCaptureCounter = 0;
+    var firstIteration = true;
+    var hasUnicodeFlag = (flags || "").indexOf("u") !== -1;
+    var pos = 0;
+
+    // Convert the input to a string and treat the empty string special.
+    str = String(str);
+    if (str === '') {
+      str = '(?:)';
+    }
+
+    var result = parseDisjunction();
+
+    if (result.range[1] !== str.length) {
+      bail('Could not parse entire input - got stuck', '', result.range[1]);
+    }
+
+    // The spec requires to interpret the `\2` in `/\2()()/` as backreference.
+    // As the parser collects the number of capture groups as the string is
+    // parsed it is impossible to make these decisions at the point when the
+    // `\2` is handled. In case the local decision turns out to be wrong after
+    // the parsing has finished, the input string is parsed a second time with
+    // the total number of capture groups set.
+    //
+    // SEE: https://github.com/jviereck/regjsparser/issues/70
+    for (var i = 0; i < backrefDenied.length; i++) {
+      if (backrefDenied[i] <= closedCaptureCounter) {
+        // Parse the input a second time.
+        pos = 0;
+        firstIteration = false;
+        return parseDisjunction();
+      }
+    }
+
+    return result;
+  }
+
+  var regjsparser = {
+    parse: parse
+  };
+
+  if (typeof module !== 'undefined' && module.exports) {
+    module.exports = regjsparser;
+  } else {
+    window.regjsparser = regjsparser;
+  }
+
+}());
diff --git a/node_modules/css-selector-tokenizer/package.json b/node_modules/css-selector-tokenizer/package.json
new file mode 100644
index 00000000..2eba5351
--- /dev/null
+++ b/node_modules/css-selector-tokenizer/package.json
@@ -0,0 +1,49 @@
+{
+  "name": "css-selector-tokenizer",
+  "version": "0.7.1",
+  "description": "Parses and stringifies CSS selectors",
+  "main": "lib/index.js",
+  "scripts": {
+    "lint": "eslint lib",
+    "pretest": "npm run lint",
+    "test": "mocha",
+    "autotest": "chokidar lib test -c 'npm test'",
+    "precover": "npm run lint",
+    "cover": "istanbul cover node_modules/mocha/bin/_mocha",
+    "travis": "npm run cover -- --report lcovonly",
+    "publish-patch": "npm test && npm version patch && git push && git push --tags && npm publish"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/css-modules/css-selector-tokenizer.git"
+  },
+  "keywords": [
+    "css-modules",
+    "selectors"
+  ],
+  "files": [
+    "lib"
+  ],
+  "author": "Tobias Koppers @sokra",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/css-modules/css-selector-tokenizer/issues"
+  },
+  "homepage": "https://github.com/css-modules/css-selector-tokenizer",
+  "dependencies": {
+    "cssesc": "^0.1.0",
+    "fastparse": "^1.1.1",
+    "regexpu-core": "^1.0.0"
+  },
+  "devDependencies": {
+    "chokidar-cli": "^0.2.1",
+    "codecov.io": "^0.1.2",
+    "coveralls": "^2.11.2",
+    "eslint": "^0.21.2",
+    "istanbul": "^0.3.14",
+    "mocha": "^2.2.5"
+  },
+  "directories": {
+    "test": "test"
+  }
+}