Limit pylint version

[rbikar]

• pylint >=4.0.0 dropped support for python3.9 and the repo isn't currently ready for testing on python3.10 or higher, so let's limit the pylint version for now.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (a2cdaef) to head (9e47642).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #117   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           13        13           
  Lines          365       365           
=========================================
  Hits           365       365           

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