Update devDependencies.

package.json

@@ -28,25 +28,25 @@
   "devDependencies": {
     "grunt": "~0.4.5",
     "grunt-autoprefixer": "~3.0.0",
-    "grunt-banner": "~0.5.0",
+    "grunt-banner": "~0.6.0",
     "grunt-contrib-clean": "~0.6.0",
-    "grunt-contrib-compress": "~0.13.0",
+    "grunt-contrib-compress": "~0.14.0",
     "grunt-contrib-concat": "~0.5.1",
     "grunt-contrib-connect": "~0.11.2",
     "grunt-contrib-copy": "~0.8.0",
     "grunt-contrib-csslint": "~0.5.0",
-    "grunt-contrib-cssmin": "~0.13.0",
-    "grunt-contrib-htmlmin": "~0.4.0",
+    "grunt-contrib-cssmin": "~0.14.0",
+    "grunt-contrib-htmlmin": "~0.6.0",
     "grunt-contrib-jshint": "~0.11.2",
     "grunt-contrib-sass": "~0.9.2",
-    "grunt-contrib-uglify": "~0.9.1",
+    "grunt-contrib-uglify": "~0.10.0",
     "grunt-contrib-watch": "~0.6.1",
     "grunt-csscomb": "~3.1.0",
     "grunt-html": "~5.0.0",
     "grunt-jekyll": "~0.4.2",
-    "grunt-jscs": "~2.1.0",
+    "grunt-jscs": "~2.3.0",
     "grunt-sed": "twbs/grunt-sed#v0.2.0",
-    "load-grunt-tasks": "~3.2.0",
+    "load-grunt-tasks": "~3.3.0",
     "time-grunt": "~1.2.0"
   },
   "engines": {