This is the first of two planned "triage" releases to update `django-address`
Release Notes:
- Django 3.0 compatibility
- Fix for None issue preventing normal use of the project. 90
- Fix for `on_delete` issue that [impacted Django 2.2](https://github.com/furious-luke/django-address/pull/81/commits/0229d57fe34a8a37d58e1bc83d618d60b0c2e7a4) [and Django 3.0](https://github.com/furious-luke/django-address/commit/62d93423e9f480feca0e22f41d872fc945615cad) differently.
- Update to project readme's stated requirements, project status and formatting. 102
- Update to setup.py to bump version and enforce updated requirements.
- Audit of and update to Example Site project interface and readme 105