Add support for enums

Author: wouterj

src/Templates/highlight.php/php.json

@@ -317,10 +317,18 @@
         },
         {
             "className": "class",
-            "beginKeywords": "class interface trait enum",
-            "end": "{",
+            "variants": [
+                {
+                    "beginKeywords": "enum",
+                    "illegal": "[($\"]"
+                },
+                {
+                    "beginKeywords": "class interface trait",
+                    "illegal": "[:($\"]"
+                }
+            ],
+            "end": "\\{",
             "excludeEnd": true,
-            "illegal": "[:\\(\\$\"]",
             "contains": [
                 {
                     "beginKeywords": "extends implements"