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

[github-actions]

This pull request changes the compat entry for the DomainSets package from 0.6 to 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 lines are covered by tests ✅

Comparison is base (5bcf055) 91.59% compared to head (2da8054) 91.45%.
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #163      +/-   ##
==========================================
- Coverage   91.59%   91.45%   -0.14%     
==========================================
  Files          11       11              
  Lines         761      761              
==========================================
- Hits          697      696       -1     
- Misses         64       65       +1     

see 1 file with indirect coverage changes

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