368: Added css() function syntax highlighting

VSCode/syntaxes/es6-inline-css.json

@@ -21,6 +21,29 @@
     }
   },
   "patterns": [
+    {
+      "begin": "(?i)(\\s*(css\\())(`)",
+      "beginCaptures": {
+        "1": {
+          "name": "entity.name.tag.html"
+        }
+      },
+      "end": "(`)",
+      "patterns": [
+        {
+          "include": "source.ts#template-substitution-element"
+        },
+        {
+          "include": "source.css"
+        },
+        {
+          "include": "inline.es6-htmlx#template"
+        },
+        {
+          "include": "string.quoted.other.template.js"
+        }
+      ]
+    },
     {
       "begin": "(?i)(\\s*(addStyle\\())(`)",
       "beginCaptures": {