chore(package): update time-grunt to version 1.4.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -51,6 +51,6 @@
     "proxyquire": "^1.6.0",
     "sinon": "^1.15.4",
     "sinon-chai": "^2.8.0",
-    "time-grunt": "^1.2.1"
+    "time-grunt": "^1.4.0"
   }
 }