www/py-django-taggit: Update to 1.2.0
- Add repo-copied Django 2.2 package from r500138 to CONFLICTS_INSTALL while I'm here.
Changelog:
- Removed support for end-of-life Django 2.0 and 2.1.
- Added support for Django 3.0.
- Added support for Python 3.8.
- Moved "TaggedItemBase.tags_for()" to "ItemBase".
- Replaced reference to removed Django's ".virtual_fields" with ".private_field".
- Added "TextareaTagWidget".
https://github.com/jazzband/django-taggit/blob/1.2.0/CHANGELOG.rst