try to fix closure compiler

Author: tinayuangao

package.json

@@ -115,7 +115,7 @@
     "ts-node": "^3.0.0",
     "tslint": "^5.0.0",
     "tslint-no-unused-var": "0.0.6",
-    "typescript": "~2.1.1",
+    "typescript": "~2.2.1",
     "uglify-js": "^2.8.14",
     "web-animations-js": "^2.2.2"
   }