use of deprecated np.NaN instead of np.nan: fails with numpy >= 2.0

[orbeckst]

As part of running MDAKit tests https://github.com/MDAnalysis/MDAKits/actions/runs/16355349978/job/46212233563#step:10:169 the following error came up:

==================================== ERRORS ====================================
_____________________ ERROR collecting test_rdf_parser.py ______________________
../../../miniconda3/envs/test/lib/python3.12/site-packages/solvation_analysis/tests/test_rdf_parser.py:88: in <module>
    ("fec_F", np.NaN),
              ^^^^^^
../../../miniconda3/envs/test/lib/python3.12/site-packages/numpy/__init__.py:781: in __getattr__
    raise AttributeError(
E   AttributeError: `np.NaN` was removed in the NumPy 2.0 release. Use `np.nan` instead.

[anujaiitj123]

I have opened a pull request with the fix for this issue.
Could you please assign this issue to me ?

[orbeckst]

I don't think that solvation analysis assigns issues. Instead, the first PR that links the issue is reviewed (at least that's how we handle new contributions in MDAnalysis). If there's no linked PR then you know that nobody else has been working on it. Therefore, I'd recommend that you submit your PR and mention this issue number in the PR comment.

I am not sure how active the solvation analysis developer community is as the moment so it may take a while for someone to review.