www/py-django-filer: Update to 3.1.0
- Introduce default option HEIF to reflect the settings as defined in setup.py.
- Remove no longer required patch.
Changelog:
https://github.com/django-cms/django-filer/releases/tag/3.1.0
PR: 274890
Approved by: portmgr (maintainer timeout, 14+ days)