feat(ci): add current django and python to test

[Rotzbua]

• Django 4.0 EOL since 01 Apr 2023.
• Django 4.1 EOL since 01 Dec 2023.
• 4.2 is new LTS.
• 5.0 is new current.

https://endoflife.date/django

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (ffd9171) 91.70% compared to head (18b4775) 91.70%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #321 +/- ## ======================================== Coverage 91.70% 91.70% ======================================== Files 9 9 Lines 229 229 Branches 35 35 ======================================== Hits 210 210 Misses 16 16 Partials 3 3 ```

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[dekkers]

We should probably also remove Python 3.6 and 3.7 as they are also end of life.

[Rotzbua]

@dekkers Yes I agree, but I think the policy of jazzband was to keep support for LTS django version and the supported python versions?