Update dependency babel-eslint to v9

Author: renovate-bot

package-lock.json

@@ -23,7 +23,7 @@
   "devDependencies": {
     "autoprefixer": "9.1.3",
     "babel-core": "6.26.3",
-    "babel-eslint": "8.2.6",
+    "babel-eslint": "9.0.0",
     "babel-loader": "7.1.5",
     "babel-plugin-transform-class-properties": "6.24.1",
     "babel-plugin-transform-decorators-legacy": "1.3.5",