.babelrc

{
  "presets": [
    "react",
    ["env", {
      "targets": {
        "browsers": ["last 4 versions", "not ie <= 9"]
      },
      "modules": false
    }],
    "stage-0"
  ],
  "env": {
    "development": {
      "presets": [
        "react",
        ["env", {
          "targets": {
            "node": "current"
          }
        }]
      ]
    },
    "test": {
      "presets": [
        "react",
        ["env", {
          "targets": {
            "node": "current"
          }
        }]
      ]
    }
  },
  "plugins": ["transform-flow-strip-types"]
}