.babelrc

{
  "plugins": [
    "@babel/plugin-proposal-object-rest-spread",
    "@babel/plugin-transform-object-assign",
    "@babel/plugin-proposal-class-properties"
  ],
  "presets": [
    "@babel/preset-react",
    [
      "@babel/preset-env",
      {
        "targets": {
          "browsers": [
            "> 1%",
            "Chrome >= 48",
            "Firefox >= 44",
            "Firefox ESR",
            "Safari >= 9.1",
            "Edge >= 12",
            "ios_saf >= 9.3",
            "ie 11"
          ]
        },
        "modules" : false,
        "forceAllTransforms": true
      }
    ]
  ],
  "env": {
    "test": {
      "presets": [
        [
          "@babel/preset-env",
          {
            "targets": {
              "node": "current"
            }
          }
        ]
      ],
      "plugins": [
        [
          "babel-plugin-styled-components",
          {
            "minify": false,
            "pure": true
          }
        ]
      ]
    }
  }
}