oklch() support

[ai]

This code

.block {
  background: oklch(0% 0 0);
}

Throws an error in declaration-property-value-no-unknown rule in Stylelint 15:

Unexpected unknown value "oklch(" for property "background"

Seems like we need to add oklch() (and maybe other functions from CSS Color 4) to csstree.

oklch() is already working in Safari, upcoming Chrome 111 and Firefox Nightly.

[ai]

I send PR to mdn/data mdn/data#642

[ai]

@lahmatiy my PR to mdn/data was merged, but after pnpm update I still have an issue.

Do we need to release csstree?

[lahmatiy]

Yes, since mdn/data is pinned in css-tree (because it breaks syntaxes time to time). But the problem is that mdn/data doesn't published a new version with your changes yet.

[Mouvedia]

dcb3b87#diff-050f35441f5af18ed49e81db6d68ef5cf2a33f992cfef5ca5019b268e19bc38aR774

[ai]

@Mouvedia no, declaration-property-value-no-unknown still doesn’t work https://github.com/logux/stylelint-config/actions/runs/6767060071/job/18389092890

@lahmatiy do we need to release a new csstree version with these mdn-data changes?

[shellscape]

@ai seems there are a number of fixes on main that need releasing as well. @lahmatiy would be great to get a new version published