{
  "env": {
    "production": {
      "presets" : [
        ["env", {
          "targets" : {
            "browsers" : ["last 2 versions"],
            "node" : "current",
          },
          "modules": false
          }]
        ],
        "sourceMaps" : true,
        "plugins": ["external-helpers"],
    },
    "test": {
      "presets" : [
        ["env", {
          "targets" : {
            "browsers" : ["last 2 versions"],
            "node" : "current",
          },
          "modules": "commonjs"
          }]
      ],
      "sourceMaps" : true,
      "plugins": []
    }
  }
}