Pin CI versions and clean up after py2

[oddstr13]

📌 Pin CI dependency versions to fully qualified version numbers
🧹 Clean up CI after removing py2

[sonarcloud]

Quality Gate failed

Failed conditions

3.4% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1663371) 21.51% compared to head (bdebed0) 21.51%.
Report is 8 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #819   +/-   ##
=======================================
  Coverage   21.51%   21.51%           
=======================================
  Files          63       63           
  Lines        8542     8542           
  Branches     1572     1572           
=======================================
  Hits         1838     1838           
  Misses       6680     6680           
  Partials       24       24           

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