- update dependencies - fix deprecation warnings - fix tests - skip some tests that need more work - reformat changed code with isort and black
- drop Python 2 __future__ imports - fix tests to handle new Django and Python 3 module names - reformat changed files with black
This commit adds tests for managemails.forms. A refactoring TODO is added to MailAddressFieldMixin and pragma: no cover has been added to code paths not reachable if no new constants are added to the MAILBOX_OR_FORWARDS constant array.
