stop testing django 2.1; django 3.0 doesn't support python 3.5
stop testing django 2.1; django 3.0 doesn't support python 3.5

Brown-University-Library/django-shibboleth-remoteuser,trevoriancox/django-shibboleth-remoteuser,trevoriancox/django-shibboleth-remoteuser,Brown-University-Library/django-shibboleth-remoteuser