Log Message:
Update py-django-taggit to 3.1.0:

- Backwards incompatible: Tag slugification used to silently strip
  non-ASCII characters from the tag name to make the slug. This leads
  to a lot of confusion for anyone using languages with non-latin
  alphabets, as well as weird performance issues.
- Backwards incompatible: TaggableManager.set now takes a list of tags
  (instead of varargs) so that its API matches Django's
  RelatedManager.set. Example:
        previously: item.tags.set("red", "blue")
        now: item.tags.set(["red", "blue"])
- Fix issue where TagField would incorrectly report that a field has changed on \ 
empty values.
- Update Russian translation.
- Add Persian translation
- Fix issue for many languages where content types were not being properly \ 
translated.
- Provide translators additional context regarding strings in TagBase model.
- Fix compiled Ukranian translation (which would cause a failure on load for \ 
this locale).
- Update compiled Danish translation.
- Vendor in the django-taggit-serializer project (under taggit.serializers).
- Add Arabic translation.
- Add Ukranian translation.