chore(package): update ts-helpers to version 1.1.2 (PatrickJS#1102)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -118,7 +118,7 @@
     "string-replace-loader": "1.0.5",
     "style-loader": "^0.13.1",
     "to-string-loader": "^1.1.4",
-    "ts-helpers": "1.1.1",
+    "ts-helpers": "1.1.2",
     "ts-node": "^1.3.0",
     "tslint": "3.15.1",
     "tslint-loader": "^2.1.3",