CompatHelper: bump compat for StructArrays to 0.7, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the StructArrays package from 0.4, 0.5, 0.6 to 0.4, 0.5, 0.6, 0.7.
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 49.51%. Comparing base (62c600d) to head (21d1699).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #463   +/-   ##
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  Coverage   49.51%   49.51%           
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  Files         121      121           
  Lines        5812     5812           
=======================================
  Hits         2878     2878           
  Misses       2934     2934           

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