Move CI to GitHub actions and add tests on windows

[patrick91]

There's a PR open for this, might be worth picking it up again: #148

So we can use GitHub Actions to run tests on windows as well as linux and Mac OS :)

TODO

• Run release on github actions (currently it is on circle ci)
• Run tests on windows

[zhidelev]

Hello, @patrick91 , I would like to work on this issue. I decided to run tests on Windows and mypy tests failed because of the pytest_mypy plugin using https://pypi.org/project/capturer which does not support Windows. So I will think about a workaround for this case. Other test cases passed on Windows.

[patrick91]

@zhidelev thanks! that's really appreciated!

[patrick91]

Migration from circle ci to GitHub actions is done here: #954

[marcoacierno]

The only thing left here is running tests on windows?

[patrick91]

yup!