.babelrc

{
  "presets": [
    ["@babel/preset-env", {
      "targets": {
        "node": "8.10.0"
      },
      "modules": false
    }],
    ["@babel/preset-stage-0", { "decoratorsLegacy": true }],
    "@babel/preset-react"
  ],
  "plugins": [
    "lodash",
    [
      "@babel/plugin-transform-runtime",
      {
        "helpers": false,
        "polyfill": false,
        "regenerator": true
      }
    ]
  ],
  "env": {
    "production": {
      "plugins": [
        "babel-plugin-transform-react-constant-elements"
      ]
    },
    "test": {
      "presets": [
        ["@babel/preset-env"],
        ["@babel/preset-stage-0", { "decoratorsLegacy": true }],
        "@babel/preset-react"
      ],
      "plugins": [
        [
          "istanbul",
          { "exclude": [ "src/**/*.test.js", "__tests__" ] }
        ]
      ]
    }
  }
}