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

Closes #204

Author: greenkeeper[bot]

package.json

@@ -62,7 +62,7 @@
     "async-describe": "1.2.0",
     "babel-cli": "6.26.0",
     "babel-core": "6.26.0",
-    "babel-eslint": "8.2.3",
+    "babel-eslint": "9.0.0",
     "babel-jest": "23.0.1",
     "babel-polyfill": "6.26.0",
     "babel-preset-es2015": "6.24.1",