chore(package): update eslint-config-babel to version 6.0.0 (#360)

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
     "codecov": "^1.0.1",
     "cross-env": "^2.0.0",
     "eslint": "^3.8.1",
-    "eslint-config-babel": "^5.0.0",
+    "eslint-config-babel": "^6.0.0",
     "eslint-plugin-flowtype": "^2.25.0",
     "nyc": "^10.0.0",
     "rimraf": "^2.4.3",