CompatHelper: bump compat for SimpleCrystals to 0.4, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the SimpleCrystals package from 0.3 to 0.3, 0.4.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.46%. Comparing base (216a112) to head (f48f4b5).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #192      +/-   ##
==========================================
- Coverage   74.58%   74.46%   -0.12%     
==========================================
  Files          36       36              
  Lines        5033     5033              
==========================================
- Hits         3754     3748       -6     
- Misses       1279     1285       +6     

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