Kick up grunt-contrib-jshint dependency

package.json

@@ -27,7 +27,7 @@
     , "grunt-contrib-concat": "~0.3.0"
     , "grunt-contrib-connect": "~0.5.0"
     , "grunt-contrib-copy": "~0.4.1"
-    , "grunt-contrib-jshint": "~0.6.4"
+    , "grunt-contrib-jshint": "~0.7.0"
     , "grunt-contrib-qunit": "~0.3.0"
     , "grunt-contrib-uglify": "~0.2.4"
     , "grunt-contrib-watch": "~0.5.3"