Try bumping gpy

[apaleyes]

Issue #, if available: n/a

Description of changes: GPy caught up with numpy>2, let's update!

By far the most common, and the most annoying, error is this:

TypeError: only 0-dimensional arrays can be converted to Python scalars

basically all places that were implicitly converting single valued arrays [1] or even [[1]] to 1 now have to explicitly extract the float

Status: everything seems to work, finishing clean up. We also need to bump lowest python to 3.11, but that's ok because 3.10 is EoL end of October this year. It's ok to merge this PR, but we should not release new version until then.

Still to do

• Match everything against Update repository to be compatible with numpy 2.0, refactor non-core functionality into optional dependencies, update to PEP 621 and PEP 660 #477, make sure there aren't dangling ends
• Consider if we need both integration-tests and examples extras
• Verify if matplotlib hack is still necessary
• Up highest version of python (3.13 right now)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.24%. Comparing base (7cd414c) to head (822ed62).
⚠️ Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #493      +/-   ##
==========================================
+ Coverage   89.10%   89.24%   +0.13%     
==========================================
  Files         137      137              
  Lines        4847     4861      +14     
  Branches      479      477       -2     
==========================================
+ Hits         4319     4338      +19     
+ Misses        402      396       -6     
- Partials      126      127       +1     

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