Upgrade babel dependencies

Author: ivome

package-lock.json

@@ -41,7 +41,7 @@
   "devDependencies": {
     "babel-cli": "^6.24.1",
     "babel-core": "^6.25.0",
-    "babel-eslint": "^7.2.3",
+    "babel-eslint": "^8.2.6",
     "babel-plugin-syntax-async-functions": "^6.13.0",
     "babel-plugin-syntax-flow": "^6.18.0",
     "babel-plugin-transform-builtin-extend": "^1.1.2",