CompatHelper: bump compat for IMASdd to 4, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the IMASdd package from 2, 3 to 2, 3, 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 32.75%. Comparing base (f1bb3d2) to head (4f389dc).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #75   +/-   ##
=======================================
  Coverage   32.75%   32.75%           
=======================================
  Files           4        4           
  Lines         580      580           
=======================================
  Hits          190      190           
  Misses        390      390           

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