Uprev to python3.11

[tomhamiltonstubber]

• Setting Python version to 3.11.
• Switching to ruff from black
• Switching to pyproject.toml from setup.cfg

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.20%. Comparing base (35ff112) to head (6408f74).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #31   +/-   ##
=======================================
  Coverage   94.20%   94.20%           
=======================================
  Files           3        3           
  Lines          69       69           
  Branches        7        7           
=======================================
  Hits           65       65           
  Misses          3        3           
  Partials        1        1           

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