chore(package): update standard to version 9.0.0-beta.0

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -73,7 +73,7 @@
     "mocha": "^2.3.4",
     "require-directory": "^2.1.1",
     "should": "^7.1.1",
-    "standard": "^5.4.1"
+    "standard": "^9.0.0-beta.0"
   },
   "dependencies": {
     "chalk": "^1.1.1",