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-commenter]

Codecov Report

❌ Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 94.63%. Comparing base (475f3cd) to head (b605365).
⚠️ Report is 14 commits behind head on master.

Files with missing lines	Patch %	Lines
src/resources/base.jl	87.50%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #144   +/-   ##
=======================================
  Coverage   94.63%   94.63%           
=======================================
  Files          12       12           
  Lines         317      317           
=======================================
  Hits          300      300           
  Misses         17       17           

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