{
  "presets": [
    ["env", {
      "modules": false,
      "targets": {
        "browsers": ["> 1%", "last 2 versions", "not ie <= 9"]
      },
      "useBuiltIns": true
    }],
    "stage-2"
  ],
  "plugins": [
    "transform-runtime",
    "syntax-dynamic-import"
  ],
  "env": {
    "test": {
      "presets": [
        "env",
        "stage-2"
      ],
      "plugins": [
        "istanbul"
      ]
    }
  }
}