feat: add support for CPython 3.15

[P403n1x87]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.36%. Comparing base (b67adbf) to head (914e39a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #192      +/-   ##
==========================================
+ Coverage   95.19%   95.36%   +0.17%     
==========================================
  Files           7        7              
  Lines        2061     2094      +33     
  Branches      446      450       +4     
==========================================
+ Hits         1962     1997      +35     
+ Misses         55       54       -1     
+ Partials       44       43       -1     

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[MatthieuDartiailh]

Thanks for starting work on this ! It is nice to see all tests passing with such a small changelog.