insomnia/packages/insomnia-inso/.babelrc

{
  "presets": [
    [
      "@babel/preset-env",
      {
        "targets": {
          "node": "12"
        }
      }
    ],
    "@babel/preset-flow"
  ],
  "plugins": [
    ["@babel/plugin-proposal-optional-chaining"]
  ]
}