Upgrade typescript version for #6

Author: lathonez

package.json

@@ -47,7 +47,7 @@
     "karma-webpack": "^2.0.3",
     "null-loader": "^0.1.1",
     "ts-loader": "^2.0.3",
-    "typescript": "2.0.9"
+    "typescript": "2.1.6"
   },
   "version": "0.0.1",
   "description": "An Ionic project"