Use versioningit for versioning

[amotl]

What the title says.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.05%. Comparing base (cd6a089) to head (ecdd5ea).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #183      +/-   ##
==========================================
+ Coverage   85.01%   85.05%   +0.04%     
==========================================
  Files           9        9              
  Lines        1121     1124       +3     
==========================================
+ Hits          953      956       +3     
  Misses        168      168              

Flag	Coverage Δ
unittests	85.05% <100.00%> (+0.04%)	⬆️

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