CompatHelper: bump compat for GATlab to 0.2, (keep existing compat)

[algebraicjuliabot]

This pull request changes the compat entry for the GATlab package from 0.1.5 to 0.1.5, 0.2.
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 89.96%. Comparing base (313ada5) to head (cdef52e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #104   +/-   ##
=======================================
  Coverage   89.96%   89.96%           
=======================================
  Files          19       19           
  Lines        1316     1316           
=======================================
  Hits         1184     1184           
  Misses        132      132           

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