Currently incompatible with Django 4.0: uses providing_args argument

I’ve installed the newly released Django 4.0. I get an error when running this code:

from notifications.signals import notify

The error is:

  File "example/.venv/lib/python3.9/site-packages/notifications/signals.py", line 5, in <module>
    notify = Signal(providing_args=[  # pylint: disable=invalid-name
TypeError: __init__() got an unexpected keyword argument 'providing_args'

As you can see in the release notes for Django 4.0, this version no longer supports the providing_args named argument for Signal.

[Flimm]

The fix is as easy as modifying notifications/signals.py to change this line from:

notify = Signal(providing_args=[  # pylint: disable=invalid-name
    'recipient', 'actor', 'verb', 'action_object', 'target', 'description',
    'timestamp', 'level'
])

to:

notify = Signal()

[PetrDlouhy]

@max-wittig I can review, but I have no rights to merge. @nemesisdesign Did merge my MR a year ago.