mypy support

[remexre]

stubgen-generated stubs seem not to work out-of-the-box, so this'll probably take a bit of manual work

[WillDenissen]

Can you elaborate on "stubgen-generated stubs"?

[remexre]

https://mypy.readthedocs.io/en/latest/stubgen.html can generate the needed stub files, sometimes.

[tomersa]

I support solving this issue so I won't have to skip type hinting on my project.

[gsingh93]

@remexre it would help if you could describe what the issue with the stubgen types is. Do you think we'll need to make the stubs from scratch or just tweak the generated ones to get them working?