Update devDependencies

Author: t32k

package.json

@@ -47,8 +47,8 @@
   },
   "devDependencies": {
     "grunt": "^0.4.5",
-    "grunt-contrib-clean": "^0.5.0",
-    "grunt-contrib-jshint": "^0.10.0",
+    "grunt-contrib-clean": "^0.6.0",
+    "grunt-contrib-jshint": "^0.11.2",
     "grunt-contrib-nodeunit": "^0.4.1"
   },
   "peerDependencies": {