Various fixes for django3 compatibility including :
Sorry about the copy/paste of the commit, but that describe accurately what actually changed.
- Replace INTERNAL_RESET_URL_TOKEN by its actual static value (removed in django3)
- Explicitly add _num_days and _today method to EmailChangeTokenGenerator (removed in django3)
- Add setting DEFAULT_AUTO_FIELD to specify primary key default field type
- Prefix apps name with 'debexpo.'
- Add additional test env for tox covering django3 (for local development)
- Bump django and django-redis dependencies in setup.py (for local development)
Additionally, the following have been fixed :
- Disable minimal size requirement for ed25519 keys (See 0a41d99c for explanation)
- Pass extra tox args to the test cli to allow running partial tests
- Exclude online nntp tests from tox conf to avoid flacky tests
- Replace celery @task by @shared_task (removed in celery 5.2)