chore(package): update eslint-config-zen to version 3.0.0

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
     "babel-eslint": "^7.1.1",
     "eslint": "^3.10.2",
     "eslint-config-iansinnott": "^1.0.1",
-    "eslint-config-zen": "^2.0.0",
+    "eslint-config-zen": "^3.0.0",
     "eslint-plugin-flowtype": "^2.25.0",
     "eslint-plugin-react": "^7.0.0"
   }