Use new classifier format for packaging

[gpotter2]

• update Scapy to new classifiers format (Python 3.13)
• minor type fixes

[codecov]

Codecov Report

Attention: Patch coverage is 18.18182% with 9 lines in your changes missing coverage. Please review.

Project coverage is 81.21%. Comparing base (cbb09c4) to head (55ae968).

Files with missing lines	Patch %	Lines
scapy/utils.py	0.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4768      +/-   ##
==========================================
- Coverage   81.26%   81.21%   -0.05%     
==========================================
  Files         363      345      -18     
  Lines       88325    88057     -268     
==========================================
- Hits        71773    71514     -259     
+ Misses      16552    16543       -9     

Files with missing lines	Coverage Δ
scapy/config.py	80.52% <100.00%> (-0.03%)	⬇️
scapy/layers/l2.py	83.91% <ø> (-0.04%)	⬇️
scapy/layers/smbclient.py	70.91% <ø> (-0.04%)	⬇️
scapy/utils.py	74.16% <0.00%> (-0.28%)	⬇️

... and 274 files with indirect coverage changes

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[polybassa]

Thanks for the PR. LGTM

[gpotter2]

It doesn't work on 3.7 and 3.8 though because a setuptools versions that goes as far doesn't exist :/ I need to think a bit about what to do