Update dependency typings to v2

Author: renovate-bot

package.json

@@ -40,6 +40,6 @@
     "ts-node": "^0.5.5",
     "tslint": "^3.6.0",
     "typescript": "^1.8.7",
-    "typings": "^0.6.6"
+    "typings": "^2.0.0"
   }
 }