chore(package): update babel-eslint to version 9.0.0 (#76)

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
   },
   "devDependencies": {
     "babel-cli": "^6.26.0",
-    "babel-eslint": "^8.2.6",
+    "babel-eslint": "^9.0.0",
     "babel-plugin-transform-decorators-legacy": "^1.3.4",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-plugin-transform-runtime": "^6.23.0",