Add Python 3.13, remove 3.8

[ods]

Changes

Fixes #

Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• Add a new news fragment into the CHANGES folder
  • name it <issue_id>.<type> (e.g. 588.bugfix)
  • if you don't have an issue_id change it to the pr id after creating the PR
  • ensure type is one of the following:
    • .feature: Signifying a new feature.
    • .bugfix: Signifying a bug fix.
    • .doc: Signifying a documentation improvement.
    • .removal: Signifying a deprecation or removal of public API.
    • .misc: A ticket has been closed, but it is not of interest to users.
  • Make sure to use full sentences with correct case and punctuation, for example: Fix issue with non-ascii contents in doctest text files.

[codecov]

Codecov Report

Attention: Patch coverage is 94.21053% with 11 lines in your changes missing coverage. Please review.

Project coverage is 95.11%. Comparing base (608ab24) to head (191354f).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
tests/conftest.py	40.00%	2 Missing and 1 partial ⚠️
aiokafka/record/_protocols.py	33.33%	0 Missing and 2 partials ⚠️
aiokafka/cluster.py	66.66%	1 Missing ⚠️
aiokafka/consumer/group_coordinator.py	88.88%	1 Missing ⚠️
aiokafka/metrics/stats/histogram.py	0.00%	1 Missing ⚠️
aiokafka/protocol/produce.py	0.00%	1 Missing ⚠️
aiokafka/record/_crc32c.py	50.00%	0 Missing and 1 partial ⚠️
tests/_testutil.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1061      +/-   ##
==========================================
+ Coverage   95.03%   95.11%   +0.07%     
==========================================
  Files         114      114              
  Lines       16985    16982       -3     
  Branches     1736     1579     -157     
==========================================
+ Hits        16142    16152      +10     
+ Misses        491      482       -9     
+ Partials      352      348       -4     

Flag	Coverage Δ
cext	92.08% <92.10%> (+0.08%)	⬆️
integration	94.80% <94.21%> (+0.06%)	⬆️
purepy	94.61% <93.68%> (+0.06%)	⬆️
unit	53.04% <81.05%> (+0.05%)	⬆️

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