chore(package): update mustache to version 2.2.0

http://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -24,7 +24,7 @@
   },
   "dependencies": {
     "gulp-util": "3.0.6",
-    "mustache": "2.1.3",
+    "mustache": "2.2.0",
     "through2": "2.0.0"
   },
   "devDependencies": {