chore(package): update babel-cli to version 6.9.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -37,7 +37,7 @@
     "rev-path": "^1.0.0"
   },
   "devDependencies": {
-    "babel-cli": "^6.7.7",
+    "babel-cli": "^6.9.0",
     "babel-core": "^6.7.7",
     "babel-eslint": "^6.0.4",
     "babel-preset-es2015": "^6.6.0",