fix: pin setuptools

[BenTenmann]

No description provided.

[codecov-commenter]

Codecov Report

Merging #11 (d576789) into main (e0ed7fd) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #11   +/-   ##
=======================================
  Coverage   97.85%   97.85%           
=======================================
  Files           4        4           
  Lines         140      140           
=======================================
  Hits          137      137           
  Misses          3        3           

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