.babelrc

{
  "env": {
    "development": {
      "presets": [
        "es2015",
        "stage-1",
        "react",
        "flow"
      ],
      "plugins": [
        ["transform-replace-object-assign", "simple-assign"],
        "transform-dev-warning"
      ]
    },
    "release": {
      "presets": [
        "es2015",
        "stage-1",
        "react",
        "flow"
      ],
      "plugins": [
        "transform-runtime",
        ["transform-react-remove-prop-types", {"mode": "wrap"}]
      ]
    },
    "test": {
      "presets": [
        "es2015",
        "stage-1",
        "react",
        "flow"
      ],
      "plugins": [
        ["transform-replace-object-assign", "simple-assign"],
        "transform-dev-warning"
      ]
    },
    "es": {
      "presets": [
        ["es2015", {"modules": false}],
        "stage-1",
        "react",
        "flow"
      ],
      "plugins": [
        ["transform-replace-object-assign", "simple-assign"],
        "transform-dev-warning"
      ]
    }
  }
}