Use PEP 639

[ktbarrett]

Bump version of setuptools and use PEP 639 syntax.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.14%. Comparing base (2bddd35) to head (98b2be7).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #113   +/-   ##
=======================================
  Coverage   67.14%   67.14%           
=======================================
  Files           3        3           
  Lines         210      210           
  Branches       51       51           
=======================================
  Hits          141      141           
  Misses         51       51           
  Partials       18       18           

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