Bump deps

Author: robneu

package.json

@@ -21,13 +21,13 @@
   "peerDependencies": {
     "autoprefixer-core": "~5.2",
     "grunt": "~0.4",
-    "grunt-banner": "~0.4",
+    "grunt-banner": "~0.5",
     "grunt-checktextdomain": "~1.0",
     "grunt-contrib-clean": "~0.6",
     "grunt-contrib-concat": "~0.5",
     "grunt-contrib-compress": "~0.13",
     "grunt-contrib-copy": "~0.8",
-    "grunt-contrib-cssmin": "~0.12",
+    "grunt-contrib-cssmin": "~0.13",
     "grunt-contrib-imagemin": "~0.9",
     "grunt-contrib-uglify": "~0.9",
     "grunt-contrib-watch": "~0.6",