Adapt codebase for compatibility with NumPy >= 2.0

[tsmbland]

Description

This pull request updates the codebase to ensure compatibility with NumPy version 2.0 and above. Changes include:

• Adjustments to specific functions and modules to accommodate new features and changes in NumPy 2.0.
• Updates to tests to ensure they pass with the new NumPy version.

Fixes #425

Type of change

Please add a line in the relevant section of
CHANGELOG.md to
document the change (include PR #) - note reverse order of PR #s.

• New feature (non-breaking change which adds functionality)
• Optimization (non-breaking, back-end change that speeds up the code)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (whatever its nature)

Key checklist

• [ x] All tests pass: $ python -m pytest
• The documentation builds and looks OK: $ python -m sphinx -b html docs docs/build

Further checks

• [x ] Code is commented, particularly in hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[HarmonicReflux]

"grouped_by\n" is superfluous and has no effect in the cell.

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 71.35%. Comparing base (93d225f) to head (aeb0fbe).

Files	Patch %	Lines
src/muse/mca.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #425      +/-   ##
===========================================
- Coverage    71.35%   71.35%   -0.01%     
===========================================
  Files           44       44              
  Lines         5879     5878       -1     
  Branches      1152     1152              
===========================================
- Hits          4195     4194       -1     
  Misses        1364     1364              
  Partials       320      320              

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[alexdewar]

LGTM!