chore(package): update babel-eslint to version 8.0.0 (#4147)

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
   "devDependencies": {
     "babel-cli": "6.26.0",
     "babel-core": "6.26.0",
-    "babel-eslint": "^7.1.1",
+    "babel-eslint": "^8.0.0",
     "babel-plugin-syntax-flow": "6.18.0",
     "babel-plugin-transform-flow-strip-types": "6.22.0",
     "babel-preset-env": "1.6.0",