{
  "presets": [
    "env",
    "stage-0"
  ],
  "sourceMaps": "true",
  "plugins": [
    "babel-plugin-transform-react-jsx",
    "transform-class-properties",
    [
      "transform-runtime",
      {
        "helpers": true,
        "polyfill": false,
        // we polyfill needed features in src/normalize.js
        "regenerator": true
      }
    ]
  ]
}