CompatHelper: bump compat for BSplineKit to 0.18, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the BSplineKit package from 0.14, 0.15, 0.16, 0.17 to 0.14, 0.15, 0.16, 0.17, 0.18.
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 4.48%. Comparing base (4217643) to head (3615249).
Report is 2 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main     #21   +/-   ##
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  Coverage   4.48%   4.48%           
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  Files         22      22           
  Lines        491     491           
=====================================
  Hits          22      22           
  Misses       469     469           

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