babel.config.js

const presets = [
	["@babel/preset-env"],
	["@babel/preset-flow"],
];
const plugins = [
	["@babel/plugin-proposal-class-properties"],
	["@babel/plugin-proposal-do-expressions"],
	["@babel/plugin-proposal-export-default-from"],
	["@babel/plugin-proposal-export-namespace-from"],
	["@babel/plugin-proposal-function-bind"],
	["@babel/plugin-proposal-function-sent"],
	["@babel/plugin-proposal-json-strings"],
	["@babel/plugin-proposal-logical-assignment-operators"],
	["@babel/plugin-proposal-nullish-coalescing-operator"],
	["@babel/plugin-proposal-numeric-separator"],
	["@babel/plugin-proposal-optional-chaining"],
	["@babel/plugin-proposal-throw-expressions"],
	["@babel/plugin-syntax-bigint"],
	["@babel/plugin-syntax-dynamic-import"],
	["@babel/plugin-syntax-import-meta"],
	["@babel/plugin-transform-arrow-functions"],
	["@babel/plugin-transform-async-to-generator"],
	["@babel/plugin-transform-block-scoping"],
	["@babel/plugin-transform-classes"],
];

module.exports = {
	presets,
	plugins,
	env: {
        test: {
            plugins: ["@babel/plugin-transform-runtime"]
        }
	}
};
``