Update devDependencies

Author: hueitan

package.json

@@ -10,13 +10,13 @@
     "devDependencies": {
         "grunt": "~0.4.2",
         "grunt-contrib-watch": "~0.5.3",
-        "grunt-contrib-connect": "~0.5.0",
+        "grunt-contrib-connect": "~0.6.0",
         "grunt-contrib-concat": "~0.3.0",
-        "grunt-contrib-uglify": "~0.2.6",
+        "grunt-contrib-uglify": "~0.3.2",
         "grunt-contrib-copy": "~0.5.0",
         "grunt-contrib-clean": "~0.5.0",
         "time-grunt": "~0.2.5",
-        "load-grunt-tasks": "~0.2.1",
+        "load-grunt-tasks": "~0.3.0",
         "karma-chrome-launcher": "~0.1.1",
         "karma-firefox-launcher": "~0.1.2",
         "karma-script-launcher": "~0.1.0",