Updated actions using the latest base images and to run using Python 3.9

[northwestwitch]

Description

Changed

• Closes Python EOL (October 2024) #132

How to test

• Automatic tests

Review

• Tests executed by GitHub actions
• "Merge and deploy" approved by

This version is a

• MAJOR - when you make incompatible API changes
• MINOR - when you add functionality in a backwards compatible manner
• PATCH - when you make backwards compatible bug fixes or documentation/instructions

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.43%. Comparing base (123ee47) to head (8016aba).
Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #139      +/-   ##
==========================================
+ Coverage   95.30%   95.43%   +0.13%     
==========================================
  Files          11       11              
  Lines         490      504      +14     
==========================================
+ Hits          467      481      +14     
  Misses         23       23              

Flag	Coverage Δ
unittests	95.43% <ø> (+0.13%)	⬆️

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