update grunt-qunit

package.json

@@ -27,7 +27,7 @@
     "socket.io": "~0.9.16"
   },
   "devDependencies": {
-    "grunt-contrib-qunit": "~0.2.2",
+    "grunt-contrib-qunit": "~0.5.2",
     "grunt-contrib-jshint": "~0.6.4",
     "grunt-contrib-cssmin": "~0.4.1",
     "grunt-contrib-uglify": "~0.2.4",