fix(browser): upgrade babel to v7 to work around an issue with `exten…

…ds Error`

Fix #9273

lib/error/validation.js

@@ -4,10 +4,9 @@
 
 'use strict';
 
-const MongooseError = require('./');
+const MongooseError = require('./mongooseError');
 const util = require('util');
 
-
 class ValidationError extends MongooseError {
   /**
    * Document Validation Error
@@ -108,4 +107,4 @@ function _generateMessage(err) {
  * Module exports
  */
 
-module.exports = exports = ValidationError;
+module.exports = ValidationError;

package.json

@@ -32,12 +32,13 @@
     "sift": "7.0.1"
   },
   "devDependencies": {
+    "@babel/core": "7.10.5",
+    "@babel/preset-env": "7.10.4",
     "acquit": "1.x",
     "acquit-ignore": "0.1.x",
     "acquit-require": "0.1.x",
     "async": "2.6.2",
-    "babel-loader": "7.1.4",
-    "babel-preset-es2015": "6.24.1",
+    "babel-loader": "8.1.0",
     "benchmark": "2.1.4",
     "bluebird": "3.5.5",
     "chalk": "2.4.2",
@@ -62,7 +63,7 @@
     "uuid": "2.0.3",
     "uuid-parse": "1.0.0",
     "validator": "10.8.0",
-    "webpack": "4.16.4"
+    "webpack": "4.44.0"
   },
   "directories": {
     "lib": "./lib/mongoose"

webpack.base.config.js

@@ -11,7 +11,7 @@ module.exports = {
         ],
         loader: 'babel-loader',
         options: {
-          presets: ['es2015']
+          presets: ['@babel/preset-env']
         }
       }
     ]