{
  "presets": [
    ["env", {
      "targets": {
        "browsers": ["last 2 versions", ">= 1%"]
      }
    }]
  ],
  "plugins": [
    "transform-object-rest-spread",
    "transform-runtime",
    ["transform-builtin-extend", {
      globals: ["Error", "Array"]
    }]
  ],
  "env": {
    "test": {
      "plugins": [
        ["istanbul", "source-map-support"]
      ]
    }
  }
}