CompatHelper: bump compat for Meshes in [weakdeps] to 0.56, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the Meshes package from 0.42 - 0.55 to 0.42 - 0.55, 0.56.
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 73.86%. Comparing base (16f17ac) to head (a1515ee).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #142   +/-   ##
=======================================
  Coverage   73.86%   73.86%           
=======================================
  Files          25       25           
  Lines        3918     3918           
=======================================
  Hits         2894     2894           
  Misses       1024     1024           

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