Update dev dependencies

Author: philwareham

package.json

@@ -17,13 +17,13 @@
     "url": "https://github.com/textpattern/textpattern-jquery-ui-theme/issues"
   },
   "devDependencies": {
-    "autoprefixer": "6.4.0",
+    "autoprefixer": "6.4.1",
     "grunt": "~1.0",
     "grunt-cli": "~1",
     "grunt-concurrent": "2.3.1",
     "grunt-contrib-clean": "1.0.0",
     "grunt-contrib-copy": "1.0.0",
-    "grunt-contrib-cssmin": "1.0.1",
+    "grunt-contrib-cssmin": "1.0.2",
     "grunt-contrib-jshint": "1.0.0",
     "grunt-contrib-watch": "1.0.0",
     "grunt-dev-update": "2.0.0",