chore(package): update grunt to version 1.0.1

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -8,7 +8,7 @@
   "license": "UNLICENSED",
   "devDependencies": {
     "ghooks": "^1.0.3",
-    "grunt": "^0.4.5",
+    "grunt": "^1.0.1",
     "grunt-cli": "^1.0.0",
     "grunt-contrib-clean": "^0.6.0",
     "grunt-contrib-copy": "^1.0.0",