CompatHelper: bump compat for TrixiTest to 0.2 for package test, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the TrixiTest package from 0.1 to 0.1, 0.2 for package test.
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 84.82%. Comparing base (9f86e3e) to head (4395453).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #141   +/-   ##
=======================================
  Coverage   84.82%   84.82%           
=======================================
  Files          15       15           
  Lines         725      725           
=======================================
  Hits          615      615           
  Misses        110      110           

Flag	Coverage Δ
unit	84.82% <ø> (ø)

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