Support Python 3.13, drop support for Python 3.8

[fizyk]

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[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 88.46154% with 3 lines in your changes missing coverage. Please review.

Project coverage is 96.51%. Comparing base (a6935de) to head (d58854d).

Files with missing lines	Patch %	Lines
mirakuru/output.py	0.00%	2 Missing ⚠️
tests/retry.py	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #798   +/-   ##
=======================================
  Coverage   96.50%   96.51%           
=======================================
  Files          20       20           
  Lines         888      889    +1     
=======================================
+ Hits          857      858    +1     
  Misses         31       31           

Flag	Coverage Δ
unittests	96.51% <88.46%> (+<0.01%)	⬆️

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