chore(package): update autoprefixer to version 6.5.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/docpress/docpress-base/issues"
   },
   "dependencies": {
-    "autoprefixer": "6.4.1",
+    "autoprefixer": "6.5.0",
     "browserify": "13.1.0",
     "debounce": "1.0.0",
     "dom101": "1.3.0",