Reduce warnings, Update CI to not use Python3.14

[Zeitsperre]

Pull Request Checklist:

• This PR addresses an already opened issue (for bug fixes / features)
  • This PR fixes issue #xyz
• Tests for the changes have been added (for bug fixes / features)
• Documentation has been added / updated (for bug fixes / features)
• HISTORY.rst has been updated (with summary of main changes)

What kind of change does this PR introduce?:

• Addresses a few RuntimeWarnings in the tests
• Fixes the CI to not use Python3.14
• Reinstalls h5py when running with tox
• Updates a handful of dependencies

Does this PR introduce a breaking change?:

Not really. The tox workflow now reinstalls h5py due to a weird issue with their pre-compiled wheels.

Other information:

[coveralls]

Pull Request Test Coverage Report for Build 19437142658

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 14 of 15 (93.33%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.008%) to 86.44%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
clisops/core/subset.py	12	13	92.31%

Totals
Change from base Build 18499402080:	0.008%
Covered Lines:	3098
Relevant Lines:	3584

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💛 - Coveralls