* Use ruff in pre-commit
* Add pyupgrade
* Add isort
* Add bugbear
* Fix B015 Pointless comparison
* Fix B026
* B018 false positive
* Remove flake8 and isort config from setup.cfg
* Remove black and flake8 from dev dependencies
* Update black
* Show list of fixes applied with autofix on
* Fix typo
* Add C4 flake8-comprehensions
* Add ruff to dev dependencies
* Fix up
* Update travis and tox
* Use xenial distribution
* Don't install coveralls twice
* Add black and flake8 tox commands
* Remove Python 3.5 test for Django master
* Fix indent
* Ignore migrations
* Remove black for now
* Run black formatting (#668)
* Run black format
* Update makefile
* Add black to travis build