{
  "env": {
    "testing": {
      "presets": [
        ["env", {
          "targets": {
            "node": "current"
          }
        }],
        "power-assert"
      ]
    }
  },
  "presets": [["env", {
    "targets": {
      "browsers": [
        "last 2 chrome versions",
        "last 2 firefox versions",
      ],
      "node": "6.10"
    }
  }]],
  "plugins": [
      ["transform-builtin-extend", {
            globals: ["Error"]
      }],
      "transform-class-properties",
      "transform-object-rest-spread"
  ]
}