CompatHelper: bump compat for "ColorVectorSpace" to "0.9"

[github-actions]

This pull request changes the compat entry for the ColorVectorSpace package from 0.6, 0.7, 0.8 to 0.6, 0.7, 0.8, 0.9.

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

Merging #937 (3c7176f) into master (810480a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #937   +/-   ##
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  Coverage   86.21%   86.21%           
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  Files           9        9           
  Lines        1023     1023           
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  Hits          882      882           
  Misses        141      141           

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[timholy]

For the record, my intention is to make ColorVectorSpace a dependency of ImageCore 0.9, so I don't think we need to merge this and similar PRs.

[johnnychen94]

I'm merging this one to smoothen our upgrade process

JuliaImages/ImageCore.jl#157 (comment)

To smoothly migrate to ColorVectorSpace(CVS) 0.9, I'll separate the task into three steps:

• declare compatibility to CVS in downstream packages
• load CVS in ImageCore (What this PR does)
• remove direct dependency to CVS in downstream packages

Otherwise, it's a little bit hard to make the CI and Pkg happy.