{
  "presets": [
    [
      "@babel/preset-env",
      {
        "modules": false,
        "targets": {
          "browsers": "> 1%, IE 11, not op_mini all, not dead"
        },
        "useBuiltIns": "usage",
        "corejs": 2
      }
    ]
  ],
  "plugins": [
    "@babel/plugin-proposal-class-properties"
  ]
}