Drop support for EOL Python and Django and update tests

[mikemanger]

This PR:

• Drops support for Django <= 4.1
• Drops support for Python 3.8
• Updates GitHub test matrix to test against current versions of Django and Python
• Uses Node 22 for standardjs CI test
• Corrects minor typo in tests file comment

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.19%. Comparing base (f61b09c) to head (23eb07f).
Report is 26 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #313      +/-   ##
==========================================
- Coverage   98.21%   98.19%   -0.02%     
==========================================
  Files           7        7              
  Lines         280      277       -3     
==========================================
- Hits          275      272       -3     
  Misses          5        5              

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[codingjoe]

Thanks @mikemanger, I appreciate the help! I was just lazily waiting for 5.2's release.