babel.config.js

module.exports = {
    presets: [

        // @see https://babeljs.io/docs/en/babel-preset-env
        ['@babel/preset-env', {

            // @see https://babeljs.io/docs/en/babel-preset-env#usebuiltins
            useBuiltIns: 'usage',

            // @see https://babeljs.io/docs/en/babel-preset-env#modules
            modules: false,

            // @see https://babeljs.io/docs/en/babel-preset-env#exclude
            exclude: [
                'transform-regenerator',
                // 'transform-async-to-generator',
            ],
        }],
    ],
    plugins: [
        // @see https://github.com/MatAtBread/fast-async
        // 'module:fast-async',

        // @see https://babeljs.io/docs/en/babel-plugin-proposal-object-rest-spread
        '@babel/plugin-proposal-object-rest-spread',

        // @see https://babeljs.io/docs/en/babel-plugin-syntax-dynamic-import
        '@babel/plugin-syntax-dynamic-import',
    ],
    env: {
        test: {
            presets: [[
                '@babel/preset-env',
            ]],
            plugins: [
                ['@babel/plugin-transform-runtime', { regenerator: true }],
            ],
        },
    },
};