chore(package): update postcss to version 5.2.5

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -8,7 +8,7 @@
  },
  "dependencies": {
  "icss-replace-symbols": "1.0.2",
- "postcss": "5.2.0",
+ "postcss": "5.2.5",
  "postcss-modules-values": "1.2.2",
  "postcss-modules-extract-imports": "1.0.0",
  "postcss-modules-local-by-default": "1.1.1",