Add Python 3.6 and 3.8 and Django 3.0 and 3.1.
Add Python 3.6 and 3.8 and Django 3.0 and 3.1.

jezdez/django-authority,jazzband/django-authority,jlward/django-authority,jazzband/django-authority,jezdez/django-authority,jlward/django-authority