.babelrc

{
  "env": {
    "test": {
      "plugins": [
        "istanbul"
      ]
    }
  },
  "presets": [
    [
      "@babel/preset-env",
      {
        "targets": {
          "browsers": [
            "ie >= 11",
            "> 1%",
            "iOS >= 8",
            "Android >= 4"
          ],
          "node": "6.10"
        },
        "useBuiltIns": "entry",
        "debug": false,
        "modules": false,
        "corejs": {
          "version": 3,
          "proposals": true
        }
      }
    ],
    [
      "@babel/preset-react"
    ]
  ],
  "plugins": [
    [
      "@babel/plugin-proposal-class-properties"
    ],
    [
      "@babel/plugin-proposal-object-rest-spread"
    ],
    [
      "@babel/plugin-transform-async-to-generator"
    ],
    [
      "@babel/plugin-transform-runtime",
      {
        "corejs": 3,
        "regenerator": true
      }
    ]
  ]
}