Follow changes in WD-css-fonts-4-20180920

See also: https://www.w3.org/TR/2018/WD-css-fonts-4-20180920/

Author: hail2u

after/syntax/css/fonts-4.vim

@@ -5,9 +5,11 @@ syn match cssFontProp contained "\<font-variation-settings\>"
 syn match cssFontProp contained "\<font-palette\>"
 syn match cssFontProp contained "\<font-presentation\>"
 syn match cssFontProp contained "\<base-palette\>"
+syn match cssFontProp contained "\<override-color\>"
 syn match cssFontProp contained "\<font-variant-emoji\>"
 syn keyword cssFontAttr contained emoji math fangsong infinity swap fallback optional light dark
 syn match cssFontAttr contained "\<system-ui\>"
 syn match cssFontAttr contained "\<historical-forms\>"
 syn region cssFunction contained matchgroup=cssFunctionName start="\<\(stylistic\|styleset\|character-variant\|swash\|ornaments\|annotation\)\s*(" end=")" oneline keepend
+" syn match cssFontDescriptor "@font-feature-values\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl
 syn match cssFontDescriptor "@font-palette-values\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

test/test.css

@@ -361,6 +361,7 @@
 
 @font-palette-values Test {
   base-palette: 1;
+  override-color: 1 rgb(43, 12, 9);
 }
 
 .gcpm-3::footnote-call,