TODO

Python 3 & deps upgrades

[] Fix test on Python 3.9
[] Upgrade Flask-WTF to 0.13 and fix metaclass error + csrf_token issues
[] Ugrade flask-sqlalchemy and other SQLA releated deps
[] Fix SQLA warnings
[] Fix all tests (including skipped ones) under Python 3.6
[] Fix issue w/ WTForms 2.2
Fix issues reported by pylint --py3k

Testing & QA

[] Add hypothesis tests
Finish "classless" unit testing refactor
Install pytest-randomly and fix errors
Fix all JS issues detected by ESlint and enable check on CI

Project management & CI

Switch to Poetry

Other

See: https://github.com/abilian/abilian-core/projects/1