CompatHelper: bump compat for DomainSets to 0.7 for package ApproxFunBaseTest, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the DomainSets package from 0.5, 0.6 to 0.5, 0.6, 0.7 for package ApproxFunBaseTest.
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 lines are covered by tests ✅

Comparison is base (e2e54f8) 75.28% compared to head (e609ed9) 63.34%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #609       +/-   ##
===========================================
- Coverage   75.28%   63.34%   -11.94%     
===========================================
  Files          80       80               
  Lines        8435     8428        -7     
===========================================
- Hits         6350     5339     -1011     
- Misses       2085     3089     +1004     

see 52 files with indirect coverage changes

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