.babelrc

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "targets": {
          "safari": "10",
          "node": true
        },
        "useBuiltIns": "entry"
      }
    ]
  ],
  "plugins": [
    [
      "@babel/plugin-proposal-decorators",
      {
        "legacy": true
      }
    ],
    "@babel/plugin-proposal-class-properties",
    [
      "@babel/plugin-transform-runtime",
      {
        "corejs": 2
      }
    ]
  ]
}