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

[github-actions]

This pull request changes the compat entry for the BSplineKit package from 0.16,0.17 to 0.16,0.17, 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 63.05%. Comparing base (4cfd40e) to head (4c5c3ac).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #259   +/-   ##
=======================================
  Coverage   63.05%   63.05%           
=======================================
  Files          23       23           
  Lines        1348     1348           
=======================================
  Hits          850      850           
  Misses        498      498           

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