{
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      "env",
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        "targets": { "browsers": [ "last 2 versions", "> 5%" ] },
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      }
    ]
  ],
  "plugins": [ "external-helpers" ],
  "env": {
    "development": {
      "sourceMaps": "inline",
      "plugins": [ "transform-runtime" ],
      "presets": [
        [
          "env",
          {
            "modules": "commonjs"
          }
        ]
      ]
    }
  }
}