chore(package): update eslint-config-standard to version 7.0.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -55,7 +55,7 @@
     "envify": "^4.0.0",
     "errorify": "^0.3.1",
     "eslint": "^3.15.0",
-    "eslint-config-standard": "^6.2.1",
+    "eslint-config-standard": "^7.0.0",
     "eslint-config-standard-jsx": "^3.3.0",
     "eslint-plugin-flowtype": "^2.30.0",
     "eslint-plugin-flowtype-errors": "^3.0.0",