Added typings to dev dependencies. #2

Signed-off-by: Sebastian Haas <sebastian@haas.tech>

package.json

@@ -57,6 +57,7 @@
     "phantomjs-prebuilt": "^2.1.7",
     "tsify": "^1.0.0",
     "tslint": "^3.8.0",
-    "typescript": "^1.8.10"
+    "typescript": "^1.8.10",
+    "typings": "^1.3.1"
   }
 }