symfony / encore @ babel / preset-env设置corejs的正确方法

Question

在@babel/preset-env更新到版本7.4.2之后，我出现了错误：

WARNING: We noticed you're using the `useBuiltIns` option without declaring a core-js version. Currently, we assume version 2.x when no version is passed. Since this default version will likely change in future versions of Babel, we recommend explicitly setting the core-js version you are using via the `corejs` option.

You should also be sure that the version you pass to the `corejs` option matches the version specified in your `package.json`'s `dependencies` section. If it doesn't, you need to run one of the following commands:

npm install --save core-js@2 npm install --save core-js@3
yarn add core-js@2 yarn add core-js@3

我发现的唯一可行的解​​决方案是在weback.config.js

中进行设置

Encore.configureBabel(function(babelConfig) {
    babelConfig.presets[0][1].corejs = 2;
}, {});

但是我不喜欢在[0][1]中进行设置以将新属性添加到预设环境数组中。 也许有更多建议以正确的方式去做？