CI for OSX and Windows #45
Description
Getting CI up and running for platforms other than GNU/Linux would make this project much easier to get into. I have tried to get both osx and windows working, but I keep running into platform specific annoyances such as cmake's FindFLEX script not providing the FLEX_INCLUDE_DIR variable on macos and std::stringstream being implemented "wrong" in the msvcpp stl has been some really annoying roadblocks.
It would be best if we could officially support all platforms (osx, linux, windows and freebsd(maybe?))
I personally dont have much experience with github workflows and the limited tinkering I have done have given me a bad impression. If anyone can help by providing a PR with the workflows that would be really nice.