ES7 async/await

.babelrc

{
  "presets": ["es2015"],
  "plugins": [
    "syntax-async-functions",
    "transform-regenerator",
    [
      "transform-runtime",
      {
        "polyfill": false,
        "regenerator": true
      }
    ]
  ]
}

package.json

{
  "dependencies": {
    "babel-plugin-syntax-async-functions": "^6.1.4",
    "babel-plugin-transform-regenerator": "^6.1.4",
    "babel-polyfill": "^6.1.4",
    "babel-preset-es2015": "^6.1.4",
    "babel-plugin-transform-runtime": "^6.23.0",
  }  
}