当我将 webpack 升级到 4.0.0-beta.3 并运行时，npx webpack serve出现以下错误：
[webpack-cli] Invalid configuration object. Object has been initialized using a configuration object that does not match the API schema.
- configuration has an unknown property 'contentBase'. These properties are valid:
object { bonjour?, client?, compress?, devMiddleware?, firewall?, headers?, historyApiFallback?, host?, hot?, http2?, https?, liveReload?, onAfterSetupMiddleware?, onBeforeSetupMiddleware?, onListening?, open?, port?, proxy?, public?, setupExitSignals?, static?, transportMode?, watchFiles? }
这是我的 webpack.config.js，适用于 3.11.2：
const path = require('path');
const ArcGISPlugin = require("@arcgis/webpack-plugin");
module.exports = {
mode: …