Add typing support

[palfrey]

Currently running mypy against something using this project gets error: Skipping analyzing 'furl': found module but no type hints or library stubs

[gruns]

do you have the time and bandwidth to add types to icecream? 🙂

[palfrey]

Turns out it's harder than that. icecream needs executing, which needs asttokens which needs astroid. Astroid has had some typing work, but it still is a way off (see pylint-dev/astroid#1024 (comment)). OTOH, if we ignore that, the others are more viable.

I've opened gristlabs/asttokens#72 to start this process, but the build system appears a bit broken there.

[gruns]

@palfrey thank you for your efforts here! 🙌

[dsully]

Looks like the asttokens change has been merged.

[palfrey]

Yup. alexmojaki/executing#57 is my initial work there

[palfrey]

And icecream with gruns/icecream#167