Support Python 3.13. Drop Polars 0.20

[staadecker]

No description provided.

[github-actions]

Lines Of Code

Language	Files	Lines	Code	Comments	Blanks	Complexity	Bytes
Python	35	5225 (-46)	4547 (-41)	270 (-2)	408 (-3)	193 (-6)	171.4K (-1.7K)
TOML	1	69 (-1)	62 (-1)	0	7	0	1.7K (-21B)
YAML	11	780 (+8)	554 (+7)	167	59 (+1)	0	24.5K (+325B)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.21%. Comparing base (f1e2c32) to head (73c8086).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #137      +/-   ##
==========================================
- Coverage   96.25%   96.21%   -0.05%     
==========================================
  Files           9        9              
  Lines        1201     1188      -13     
==========================================
- Hits         1156     1143      -13     
  Misses         45       45              

Flag	Coverage Δ
smart-tests	96.21% <100.00%> (-0.05%)	⬇️

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