.babelrc

{
  
  "env": {
    "test": {
      "presets": [
        ["es2015", {"loose": true}],
        "stage-2"
      ],
      "plugins": [
        ["add-module-exports", "transform-object-rest-spread"]
      ]
    },
    "cjs": {
      "presets": [
        ["es2015", {"loose": true}],
        "stage-2"
      ],
      "plugins": [
        ["add-module-exports", "transform-object-rest-spread"]
      ]
    },
    "es": {
      "presets": [
        ["es2015", {"loose": true, "modules": false}],
        "stage-2"
      ],
      "plugins": [
        ["add-module-exports", "transform-object-rest-spread"]
      ]
    }
  }
}