.babelrc

{
  "presets": [
    [
      "@babel/env",
      {
        "targets": {
          "node": 4
        }
      }
    ]
  ],
  "plugins": [
    // Stage 2
    ["@babel/plugin-proposal-decorators", { "legacy": true }],
    "@babel/plugin-proposal-function-sent",
    "@babel/plugin-proposal-export-namespace-from",
    "@babel/plugin-proposal-numeric-separator",
    "@babel/plugin-proposal-throw-expressions",

    // Stage 3
    "@babel/plugin-syntax-dynamic-import",
    "@babel/plugin-syntax-import-meta",
    ["@babel/plugin-proposal-class-properties", { "loose": true }],
    "@babel/plugin-proposal-json-strings",
    [
      "@babel/transform-runtime",
      {
        "helpers": false,
        "regenerator": true
      }
    ]
  ]
}