Merge pull request #7 from halfzebra/patch-1

Upgrade postcss version to v7

Author: MattDiMu

package.json

@@ -20,7 +20,7 @@
     "index.js"
   ],
   "dependencies": {
-    "postcss": "^6.0.1"
+    "postcss": "^7.0.2"
   },
   "devDependencies": {
     "ava": "^0.19.1",