My small set of mypy stubs for pytest

Installing

1. Since these are just stubs of pytest functions that I need for my project, just pip install from master: pip install 'git+git://github.com/ChazZeromus/pytest-stubs.git@master#pytest-stubs'
2. And the rest should just be running mypy as usual. Mypy detects -stubs packages automatically, so you're all set!

TODO:

• PEP-0561 specifies that partial stubs (like this one, obviously), should be marked as "partial"
• Stub everything else?
• Organize third-party pytest plugins into their own packages