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diff --git a/node_modules/hash-base/LICENSE b/node_modules/hash-base/LICENSE
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+The MIT License (MIT)
+
+Copyright (c) 2016 Kirill Fomichev
+
+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/hash-base/README.md b/node_modules/hash-base/README.md
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+# hash-base
+
+[![NPM Package](https://img.shields.io/npm/v/hash-base.svg?style=flat-square)](https://www.npmjs.org/package/hash-base)
+[![Build Status](https://img.shields.io/travis/crypto-browserify/hash-base.svg?branch=master&style=flat-square)](https://travis-ci.org/crypto-browserify/hash-base)
+[![Dependency status](https://img.shields.io/david/crypto-browserify/hash-base.svg?style=flat-square)](https://david-dm.org/crypto-browserify/hash-base#info=dependencies)
+
+[![js-standard-style](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
+
+Abstract base class to inherit from if you want to create streams implementing the same API as node crypto [Hash][1] (for [Cipher][2] / [Decipher][3] check [crypto-browserify/cipher-base][4]).
+
+## Example
+
+```js
+const HashBase = require('hash-base')
+const inherits = require('inherits')
+
+// our hash function is XOR sum of all bytes
+function MyHash () {
+  HashBase.call(this, 1) // in bytes
+
+  this._sum = 0x00
+}
+
+inherits(MyHash, HashBase)
+
+MyHash.prototype._update = function () {
+  for (let i = 0; i < this._block.length; ++i) this._sum ^= this._block[i]
+}
+
+MyHash.prototype._digest = function () {
+  return this._sum
+}
+
+const data = Buffer.from([ 0x00, 0x42, 0x01 ])
+const hash = new MyHash().update(data).digest()
+console.log(hash) // => 67
+```
+You also can check [source code](index.js) or [crypto-browserify/md5.js][5]
+
+## LICENSE
+
+MIT
+
+[1]: https://nodejs.org/api/crypto.html#crypto_class_hash
+[2]: https://nodejs.org/api/crypto.html#crypto_class_cipher
+[3]: https://nodejs.org/api/crypto.html#crypto_class_decipher
+[4]: https://github.com/crypto-browserify/cipher-base
+[5]: https://github.com/crypto-browserify/md5.js
diff --git a/node_modules/hash-base/index.js b/node_modules/hash-base/index.js
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+'use strict'
+var Buffer = require('safe-buffer').Buffer
+var Transform = require('stream').Transform
+var inherits = require('inherits')
+
+function throwIfNotStringOrBuffer (val, prefix) {
+  if (!Buffer.isBuffer(val) && typeof val !== 'string') {
+    throw new TypeError(prefix + ' must be a string or a buffer')
+  }
+}
+
+function HashBase (blockSize) {
+  Transform.call(this)
+
+  this._block = Buffer.allocUnsafe(blockSize)
+  this._blockSize = blockSize
+  this._blockOffset = 0
+  this._length = [0, 0, 0, 0]
+
+  this._finalized = false
+}
+
+inherits(HashBase, Transform)
+
+HashBase.prototype._transform = function (chunk, encoding, callback) {
+  var error = null
+  try {
+    this.update(chunk, encoding)
+  } catch (err) {
+    error = err
+  }
+
+  callback(error)
+}
+
+HashBase.prototype._flush = function (callback) {
+  var error = null
+  try {
+    this.push(this.digest())
+  } catch (err) {
+    error = err
+  }
+
+  callback(error)
+}
+
+HashBase.prototype.update = function (data, encoding) {
+  throwIfNotStringOrBuffer(data, 'Data')
+  if (this._finalized) throw new Error('Digest already called')
+  if (!Buffer.isBuffer(data)) data = Buffer.from(data, encoding)
+
+  // consume data
+  var block = this._block
+  var offset = 0
+  while (this._blockOffset + data.length - offset >= this._blockSize) {
+    for (var i = this._blockOffset; i < this._blockSize;) block[i++] = data[offset++]
+    this._update()
+    this._blockOffset = 0
+  }
+  while (offset < data.length) block[this._blockOffset++] = data[offset++]
+
+  // update length
+  for (var j = 0, carry = data.length * 8; carry > 0; ++j) {
+    this._length[j] += carry
+    carry = (this._length[j] / 0x0100000000) | 0
+    if (carry > 0) this._length[j] -= 0x0100000000 * carry
+  }
+
+  return this
+}
+
+HashBase.prototype._update = function () {
+  throw new Error('_update is not implemented')
+}
+
+HashBase.prototype.digest = function (encoding) {
+  if (this._finalized) throw new Error('Digest already called')
+  this._finalized = true
+
+  var digest = this._digest()
+  if (encoding !== undefined) digest = digest.toString(encoding)
+
+  // reset state
+  this._block.fill(0)
+  this._blockOffset = 0
+  for (var i = 0; i < 4; ++i) this._length[i] = 0
+
+  return digest
+}
+
+HashBase.prototype._digest = function () {
+  throw new Error('_digest is not implemented')
+}
+
+module.exports = HashBase
diff --git a/node_modules/hash-base/package.json b/node_modules/hash-base/package.json
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+{
+  "name": "hash-base",
+  "version": "3.0.4",
+  "description": "abstract base class for hash-streams",
+  "keywords": [
+    "hash",
+    "stream"
+  ],
+  "homepage": "https://github.com/crypto-browserify/hash-base",
+  "bugs": {
+    "url": "https://github.com/crypto-browserify/hash-base/issues"
+  },
+  "license": "MIT",
+  "author": "Kirill Fomichev <fanatid@ya.ru> (https://github.com/fanatid)",
+  "files": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/crypto-browserify/hash-base.git"
+  },
+  "scripts": {
+    "coverage": "nyc node test/*.js",
+    "lint": "standard",
+    "test": "npm run lint && npm run unit",
+    "unit": "node test/*.js"
+  },
+  "dependencies": {
+    "inherits": "^2.0.1",
+    "safe-buffer": "^5.0.1"
+  },
+  "devDependencies": {
+    "nyc": "^8.3.2",
+    "standard": "*",
+    "tape": "^4.2.0"
+  },
+  "engines": {
+    "node": ">=4"
+  }
+}