.babelrc

{
    "presets": [
      [
        "env",
        {
          "modules": false,
          "useBuiltIns": true,
          "targets": {
            "browsers": [
              "last 2 Chrome versions",
              "last 2 ChromeAndroid versions",
              "last 2 Edge versions",
              "last 2 Firefox versions",
              "last 2 Safari versions",
              "last 2 iOS versions"
            ]
          },
          "exclude": [
            "es6.typed.array-buffer",
            "es6.typed.data-view",
            "es6.typed.int8-array",
            "es6.typed.uint8-array",
            "es6.typed.uint8-clamped-array",
            "es6.typed.int16-array",
            "es6.typed.uint16-array",
            "es6.typed.int32-array",
            "es6.typed.uint32-array",
            "es6.typed.float32-array",
            "es6.typed.float64-array"
          ]
        }
      ],
      "react",
      "stage-3"
    ],
  
    "plugins": [
      "react-hot-loader/babel",
      "syntax-dynamic-import"
    ],
  
    "env": {
      "test": {
        "presets": ["env", "react", "stage-3"],
        "plugins": ["transform-es2015-modules-commonjs", "dynamic-import-node"]
      }
    }
  }