typescript version decrease

package.json

@@ -58,7 +58,7 @@
     "ts-node": "2.1.0",
     "tslint": "4.5.1",
     "tslint-loader": "3.4.3",
-    "typescript": "2.2.1",
+    "typescript": "2.2.0",
     "webpack": "2.2.1",
     "webpack-node-externals": "1.5.4"
   },