CompatHelper: bump compat for DataStructures to 0.19, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the DataStructures package from 0.18 to 0.18, 0.19.
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 77.34%. Comparing base (c05a548) to head (abc7ed6).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##            main     #248       +/-   ##
==========================================
+ Coverage   0.00%   77.34%   +77.34%     
==========================================
  Files         75       77        +2     
  Lines       3784     3805       +21     
==========================================
+ Hits           0     2943     +2943     
+ Misses      3784      862     -2922     

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