CompatHelper: bump compat for DomainSets to 0.8, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the DomainSets package from 0.7 to 0.7, 0.8.
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 96.60%. Comparing base (bbf6df0) to head (107e693).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #218   +/-   ##
=======================================
  Coverage   96.60%   96.60%           
=======================================
  Files           8        8           
  Lines        1059     1059           
=======================================
  Hits         1023     1023           
  Misses         36       36           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.