www/py-django-js-asset: Update to 2.2.0

* This update remedies build issues with devel/py-hatchling 1.19 or
  later and should fix the build after 177a1750 [1]

Changelog:

https://github.com/matthiask/django-js-asset/blob/2.2/CHANGELOG.rst

PR:		275770 (for py-dj42-django-js-asset) [1]
Reported by:	Einar Bjarni Halldórsson [1]