Add tests on Python 3.13 in GitHub Actions

[TaiSakuma]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.15%. Comparing base (ede13d9) to head (c036a4a).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #66      +/-   ##
==========================================
+ Coverage   93.10%   93.15%   +0.04%     
==========================================
  Files          54       54              
  Lines        2177     2177              
  Branches      324      172     -152     
==========================================
+ Hits         2027     2028       +1     
  Misses        118      118              
+ Partials       32       31       -1     

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