[css-pseudo-4] Add stroke-color/fill-color/stroke-width. #2362

Author: fantasai

css-pseudo-4/Overview.bs

@@ -487,6 +487,7 @@ Styling Highlights</h3>
     <li>'outline' and its longhands
     <li>'text-decoration' and its associated properties
     <li>'text-shadow'
+    <li>'stroke-color', 'fill-color', and 'stroke-width'
   </ul>
 
   Issue: Are there any other properties that should be included here?