Test with Python 3.13 and Numpy 2.x

[mdekstrand]

This adds Python 3.13 to the test matrix and relaxes the Numpy upper bound, and bumps a couple of other deps for SPEC0.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.31%. Comparing base (114b5da) to head (bcd8070).
Report is 12 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #550      +/-   ##
==========================================
+ Coverage   90.30%   90.31%   +0.01%     
==========================================
  Files         100      100              
  Lines        5950     5950              
==========================================
+ Hits         5373     5374       +1     
+ Misses        577      576       -1     

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