.babelrc

{
  "presets": [
    ["@babel/preset-env", {
      "modules": "commonjs"
    }]
  ],
  "plugins": [
    "@babel/plugin-transform-object-assign",
    ["@babel/plugin-transform-runtime",
      {
        "regenerator": true
      }
    ],
    ["@babel/plugin-proposal-decorators", {
      "legacy": true
    }],
    "@babel/plugin-proposal-class-properties"
  ],
  "env": {
    "test": {
      "plugins": [
        "istanbul"
      ]
    }
  }
}