Update grunt-contib-jshint to v0.12.0.

Author: XhmikosR

package.json

@@ -30,7 +30,7 @@
     "grunt": "~0.4.5",
     "grunt-contrib-clean": "~0.7.0",
     "grunt-contrib-concat": "~0.5.1",
-    "grunt-contrib-jshint": "~0.11.0",
+    "grunt-contrib-jshint": "~0.12.0",
     "grunt-contrib-watch": "~0.6.1",
     "grunt-include-replace": "~3.2.0",
     "load-grunt-tasks": "~3.4.0",