babel.config.json

{
    "assumptions": {
        "setPublicClassFields": true,
        "setSpreadProperties": true
    },
    "presets": [
        [
            "@babel/preset-env",
            {
                "modules": false,
                "targets": {
                    "firefox": "60",
                    "chrome": "67",
                    "safari": "12.1"
                },
                "exclude": ["@babel/plugin-transform-template-literals"]
            }
        ],
        "@babel/preset-react",
        "@babel/preset-typescript"
    ],
    "plugins": ["@babel/plugin-proposal-class-properties"],
    "comments": false,
    "sourceMaps": true
}