Add support for Python 3.13, remove support for Python 3.8

[samschott]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.28%. Comparing base (26c6af2) to head (f977258).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #201      +/-   ##
==========================================
+ Coverage   85.13%   85.28%   +0.14%     
==========================================
  Files          10       10              
  Lines         895      890       -5     
==========================================
- Hits          762      759       -3     
+ Misses        133      131       -2     

Flag	Coverage Δ
pytest	85.28% <100.00%> (+0.14%)	⬆️

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