Update Django REST Framework within Django version constraint

[phillxnet]

As part of our current effort to update our dependencies, we have the following pinning:
djangorestframework = "==3.9.3"
This should be re-assessed give our recent Python and Django updates. And to help with our pending update to Django 3.2 by way of the linked Milestone.

[phillxnet]

From:
We have:

Requirements
REST framework requires the following:

Python (3.6, 3.7, 3.8, 3.9, 3.10)
Django (2.2, 3.0, 3.1, 3.2, 4.0, 4.1)
We highly recommend and only officially support the latest patch release of each Python and Django series.

However we have no mention of Django 2.2 on the latest version's PyPi page:
https://pypi.org/project/djangorestframework/

For security reasons we need at least 3.11.2 However the page for this version:
https://pypi.org/project/djangorestframework/3.11.2/ states Django 2.2 as the last latest version.

From https://www.django-rest-framework.org/community/release-notes/#3140
3.14.0 improves support re newer Py3.9 capabilities, but drops Django 2.2:

• Django 2.2 is no longer supported. ...Update supported versions for 3.14 release encode/django-rest-framework#8662
• Django 4.1 compatibility. ...
• Make ReturnDict support dict union operators on Python 3.9 and later. ...

So we still require a pin of sorts to avoid loosing our current stepping stone of Django 2.2.

And for our in-comming Django 3.2 Milestone we see that
3.13.0 has: https://www.django-rest-framework.org/community/release-notes/#3130

• Django 4.0 compatability. ...

Current pinning candidate: last of 3.13 series: 3.13.1

PyPi page has:

• Django 2.2 -> 4.0
• Python 3.6 ->: 3.10

[phillxnet]

lbuildvm:/opt/rockstor # poetry update
Updating dependencies
Resolving dependencies... (7.3s)

Writing lock file

Package operations: 0 installs, 1 update, 0 removals

  • Updating djangorestframework (3.9.3 -> 3.13.1)

no new migrations:

export DJANGO_SETTINGS_MODULE=settings
lbuildvm:/opt/rockstor # poetry run django-admin makemigrations

No changes detected

And the new tree view for this package:

djangorestframework 3.13.1 Web APIs for Django, made easy.
├── django >=2.2
│   ├── pytz * 
│   └── sqlparse >=0.2.2 
└── pytz *

[phillxnet]

All tests pass, moving to Draft PR for end-to-end build test.

[phillxnet]

Closing as:
Fixed by #2697