* [symengine] Add new port

* [symengine] Fix boost.math dependency

boost.lexical_cast depends on boost.math.

* [symengine] Fix linux build

* [symengine] Modernize

* [symengine] Update to 2019-11-30

* [symengine] Disable dynamic build on Windows

[symengine] Modernize

* [symengine] Update to 2020-05-12

* [symengine] Update to 2020-05-23

* [symengine] Let us give uwp a try

* [symengine] Dynamic library support

* [symengine] Update

* [symengine] INTERFACE_INCLUDE_DIRECTORIES

* [symengine] Add feature tcmalloc

* [symengine] Update to 2020-05-25