CompatHelper: bump compat for Nemo to 0.42, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the Nemo package from 0.38, 0.39, 0.40, 0.41 to 0.38, 0.39, 0.40, 0.41, 0.42.
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 ✅

Comparison is base (50d3b34) 82.90% compared to head (c6bcdb3) 82.84%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #236      +/-   ##
==========================================
- Coverage   82.90%   82.84%   -0.06%     
==========================================
  Files          55       55              
  Lines        3673     3673              
==========================================
- Hits         3045     3043       -2     
- Misses        628      630       +2     

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