Update dependencies.

package.json

@@ -25,17 +25,17 @@
     "test": "grunt test"
   },
   "devDependencies": {
-    "grunt": "~0.4.2",
+    "grunt": "~0.4.3",
     "grunt-contrib-clean": "~0.5.0",
     "grunt-contrib-concat": "~0.3.0",
     "grunt-contrib-copy": "~0.5.0",
     "grunt-contrib-csslint": "~0.2.0",
     "grunt-contrib-cssmin": "~0.9.0",
-    "grunt-contrib-jshint": "~0.8.0",
-    "grunt-contrib-nodeunit": "~0.3.2",
-    "grunt-contrib-sass": "~0.7.2",
+    "grunt-contrib-jshint": "~0.9.0",
+    "grunt-contrib-nodeunit": "~0.3.3",
+    "grunt-contrib-sass": "~0.7.3",
     "grunt-contrib-uglify": "~0.4.0",
-    "grunt-contrib-watch": "~0.5.3",
+    "grunt-contrib-watch": "~0.6.0",
     "grunt-csscomb": "~2.0.1",
     "grunt-html-validation": "~0.1.13",
     "grunt-jekyll": "~0.4.1",