.babelrc

{
    "presets": [
        ["@babel/env", {
            "loose": true,
            "useBuiltIns": "usage",
            "targets": {
                "node": "current",
                "browsers": [ ">0.25%", "not ie 11", "not op_mini all"]
            }
        }]
    ],
    "plugins": [
        ["@babel/plugin-proposal-object-rest-spread", { "loose": true, "useBuiltIns": true }]
    ],
    "sourceMaps": "inline"
}