get_approx_account_lockouts_from_login_attempts
* Use redis cache in `get_approx_account_lockouts_from_login_attempts` * use django_redis in ci * Add `django_redis` and `redis` to requirements.txt * Fix an issue detected by tests: clear redis cache upon block reset * Remove the unnecessary `if`
* Add GitHub Actions test workflow. * Add release workflow. * Remove Travis cruft and update changelog. * Fix deps. * Remove Celery version restriction. * Relax installation requirements a bit. * Update README.rst * Update tox.ini