chore(package): update xss to version 0.3.3

https://greenkeeper.io/

package.json

@@ -20,6 +20,6 @@
     "eslint": "^2.0.0"
   },
   "dependencies": {
-    "xss": "^0.2.13"
+    "xss": "^0.3.3"
   }
 }