Mypy now supports pyproject.toml

[CAM-Gerlach]

Mypy now supports pyproject.toml in python/mypy#10219 released with v0.900 (AFAIK, since the PR isn't marked with a milestone), FYI. Aside from pipenv, flake8 is the last listed tool not supporting pyproject.toml.

Also, the formatting between pylint and flake8 looks a little borked.

Happy to submit a PR if desired.

[flying-sheep]

Thank you! Indeed it does!