Prepare release v0.0.28, pin numpy below v2.4

[Zeitsperre]

Description

Prepares the next release (v0.0.28) of xskillscore.

It's entirely possible that this release closes a few existing issues; Will do a look-over after release.

Closes #443

Type of change

• Software release preparation PR.
• pre-commit autoupdate.
• numpy has been pinned below v2.4 due to breaking changes.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. This could point to a cell in the updated notebooks. Or a snippet of code with accompanying figures here.

Checklist (while developing)

N/A

Pre-Merge Checklist (final steps)

• I have rebased onto main or develop (wherever I am merging) and dealt with any conflicts.
• I have squashed commits to a reasonable amount, and force-pushed the squashed commits.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.56%. Comparing base (fb60981) to head (2332c41).
⚠️ Report is 13 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #441   +/-   ##
=======================================
  Coverage   94.56%   94.56%           
=======================================
  Files          27       27           
  Lines        2833     2836    +3     
=======================================
+ Hits         2679     2682    +3     
  Misses        154      154           

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[Zeitsperre]

@aaronspring We'll double-check that climpred is building with this branch before we merge it and make the final release.