.babelrc

{
  "presets": [
    [
      "@babel/env",
      {
        "targets": {
          "browsers": ["last 2 versions", "safari >= 7"]
        }
      }
    ],
    "@babel/preset-react"
  ],
  "plugins": [
    [
      "@babel/plugin-transform-runtime",
      {
        "helpers": false,
        "regenerator": true
      }
    ],
    ["@babel/plugin-proposal-decorators", { "legacy": true }],
    "@babel/plugin-syntax-dynamic-import",
    "@babel/transform-async-to-generator",
    "@babel/plugin-proposal-do-expressions",
    "@babel/plugin-proposal-class-properties"
  ]
}