{
  "presets": [
    [
      "@babel/preset-env",
      {
        "targets": {
          "browsers": [
            ">1%",
            "last 4 versions",
            "Firefox ESR",
            "not ie < 9"
          ]
        }
      }
    ],
    [
      "@babel/preset-stage-0",
      {
        "decoratorsLegacy": true
      }
    ]
  ]
}