.babelrc

{
  "env": {
    "cjs": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "node": "4"
            },
            "modules": false,
            "useBuiltIns": true,
            "debug": true
          }
        ]
      ],
      "plugins": ["@babel/plugin-external-helpers"]
    },
    "es": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "node": "current"
            },
            "modules": false,
            "useBuiltIns": true,
            "debug": true
          }
        ]
      ],
      "plugins": ["@babel/plugin-external-helpers"]
    },
    "test": {
      "presets": ["@ava/stage-4"],
      "plugins": [
        [
          "module-resolver",
          {
            "root": ["./"],
            "alias": {
              "consolidator": "./lib/consolidator.js",
              "constants": "./test/shared/constants/index.js",
              "functional": "./test/functional",
              "unit": "./test/unit"
            }
          }
        ],
        ["istanbul"]
      ]
    }
  }
}