feat(django): update django app to be compatible for Django 4.x

[DilLip-Chowdary-Codes]

• The django.db.backends.postgresql_psycopg2 module is removed in Django3.0
• The get_response argument for django.utils.deprecation.MiddlewareMixin.init() is required and doesn’t accept None

[github-actions]

This pull request has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you label it Status: Backlog or Status: In Progress, I will leave it alone ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀

[sentrivana]

Hey @DilLip-Chowdary-Codes, thanks for opening this. I've updated your branch to our current master and ran the pipeline, some steps are red, can you please take a look?

[antonpirker]

As the only change left has a alias since Django 1.9 (and we officially support only Django 1.11+) this should be good to merge!