Update CI

[devmotion]

The PR updates the CI setup a bit:

• Tests are run with min, lts, and 1 Julia versions
• Codecov action is updated to v5 (fixes Bump codecov/codecov-action from 4 to 5 #723)
• The julia-actions/cache action is used instead of manual caching

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.23%. Comparing base (c310fb5) to head (caa0395).
Report is 13 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #730      +/-   ##
==========================================
- Coverage   89.57%   89.23%   -0.35%     
==========================================
  Files          11       11              
  Lines         969      975       +6     
==========================================
+ Hits          868      870       +2     
- Misses        101      105       +4     

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