Update packages to the latest versions

Unblock builds on the new infrastructure.

Author: supertassu

package.json

@@ -21,8 +21,8 @@
     }
   ],
   "dependencies": {
-    "grunt": "1.3.0",
-    "grunt-cli": "1.3.2",
-    "grunt-jquery-content": "3.0.3"
+    "grunt": "1.6.1",
+    "grunt-cli": "1.4.3",
+    "grunt-jquery-content": "3.1.0"
   }
 }