MAINT: Replace deprecated numpy assertions in coordinates/base.py

[Dreamstick9]

Fixes #3743

Changes made in this Pull Request:

• Replaced deprecated assert_almost_equal and assert_array_almost_equal with assert_allclose in testsuite/MDAnalysisTests/coordinates/base.py.
• Converted decimal precision to atol=10**(-decimal) and rtol=0 to maintain original test strictness.
• Added contributor name to package/AUTHORS.

PR Checklist

• Issue raised/referenced?
• Tests updated/added?
• Documentation updated/added?
• package/CHANGELOG file updated?
• Is your name in package/AUTHORS?

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Documentation preview : https://mdanalysis--5156.org.readthedocs.build/en/5156/

[github-actions]

Hello there first time contributor! Welcome to the MDAnalysis community! We ask that all contributors abide by our Code of Conduct and that first time contributors introduce themselves on GitHub Discussions so we can get to know you. You can learn more about participating here. Please also add yourself to package/AUTHORS as part of this PR.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.72%. Comparing base (5c11b50) to head (5b23f52).
⚠️ Report is 4 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #5156   +/-   ##
========================================
  Coverage    92.72%   92.72%           
========================================
  Files          180      180           
  Lines        22457    22472   +15     
  Branches      3186     3188    +2     
========================================
+ Hits         20823    20837   +14     
  Misses        1177     1177           
- Partials       457      458    +1     

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[Dreamstick9]

Hi! The Windows test failed in test_density.py with a MaybeEncodingError (unrelated to my changes). Could you please trigger a re-run?

[IAlibay]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).