.babelrc

{
  "presets": [
    "module:metro-react-native-babel-preset",
    "@babel/preset-flow"
  ],
  "sourceMaps": true,
  "plugins": [
    "@babel/plugin-transform-flow-strip-types",
    ["@babel/plugin-proposal-decorators", { "legacy": true }],
    ["@babel/plugin-proposal-class-properties", { "loose": true }],
    [
      "rewrite-require",
      {
        "aliases": {
          "crypto": "react-native-crypto",
          "stream": "readable-stream",
          "_stream_duplex": "readable-stream/duplex",
          "_stream_passthrough": "readable-stream/passthrough",
          "_stream_readable": "readable-stream/readable",
          "_stream_transform": "readable-stream/transform",
          "_stream_writable": "readable-stream/writable",
          "vm": "vm-browserify"
        },
        "throwForNonStringLiteral": true
      }
    ]
  ]
}