.babelrc

{
  "presets": [
    [
      "babel-preset-gatsby",
      {
        "targets": {
          "browsers": [">0.25%", "not dead"]
        }
      }
    ],
    "@babel/preset-typescript",
    [
      "@babel/preset-env",
      {
        "targets": {
          "node": "6.10.3"
        }
      }
    ]
  ],
  "plugins": [
    "@babel/plugin-proposal-class-properties",
    "@babel/plugin-transform-object-assign",
    "@babel/plugin-proposal-object-rest-spread"
  ]
}