Test failure regarding pytest 7.2.0 update

[ryanking13]

Recent pytest 7.2.0 update dropped py dependency (pytest-dev/pytest#10396).
And it seems like quite a lot of pytest-* plugins were using py package without installing it explicitly.

This is causing some errors in our CI (1, 2).

A hotfix would be pinning pytest version < 7.2. But I guess plugin devs will soon make a release with a fix (pytest-benchmark already did), or we can ask them to add py as a dependency.

[The-Compiler]

FYI, I opened a PR against pytest-mypy-plugins visible in that first CI log: typeddjango/pytest-mypy-plugins#106

As a workaround, you could also add py to your own dependencies temporarily, until the plugins are fixed.

[ryanking13]

Thanks a lot @The-Compiler!