.babelrc

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "modules": false,
        "forceAllTransforms": true,
        "useBuiltIns": "entry"
      }
    ]
  ],
  "env": {
    "test": {
      "presets": [
        ["@babel/preset-env", {
          "targets": {
            "node": "current"
          }
      }]]
    }
  },
  "plugins": [
    "@babel/plugin-transform-destructuring",
    "@babel/plugin-syntax-dynamic-import",
    [
      "@babel/plugin-proposal-object-rest-spread",
      {
        "useBuiltIns": true
      }
    ],
    [
      "@babel/plugin-transform-runtime",
      {
        "helpers": false,
        "regenerator": true
      }
    ],
    [
      "@babel/plugin-transform-regenerator",
      {
        "async": false
      }
    ],
    [
      "@babel/plugin-proposal-class-properties",
      {
        "loose": true
      }
    ]
  ]
}