Fix `notifications` deprecation errors

[brylie]

Description

When running management commands, I see the following deprecation warnings.

/OpenCiviWiki/.venv/lib/python3.10/site-packages/notifications/base/models.py:22: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
  if StrictVersion(get_version()) >= StrictVersion('1.8.0'):
/OpenCiviWiki/.venv/lib/python3.10/site-packages/notifications/views.py:20: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
  if StrictVersion(get_version()) >= StrictVersion('1.7.0'):
OpenCiviWiki/.venv/lib/python3.10/site-packages/notifications/urls.py:9: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.

What should have happened?

There should be no deprecation errors when running management commands.

Upstream issue: django-notifications/django-notifications#344

[DamyanBG]

Hello, I want to contirbute.

[brylie]

Thanks, @DamyanBG! I'll assign you to the issue.

[DamyanBG]

I made a PR.

[DamyanBG]

I found that my solution is wrong. I closed my PR. I will restart my work.

[brylie]

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[DamyanBG]

I opened pull request.