Whitelist transformers in `.babelrc` for projects

.babelrc

{
  "retainLines": true,
  "compact": true,
  "comments": false,
  "whitelist": [
    "es6.arrowFunctions",
    "es6.blockScoping",
    "es6.classes",
    "es6.constants",
    "es6.destructuring",
    "es6.modules",
    "es6.parameters",
    "es6.properties.computed",
    "es6.properties.shorthand",
    "es6.spread",
    "es6.templateLiterals",
    "es7.classProperties",
    "es7.decorators",
    "es7.exportExtensions",
    "es7.objectRestSpread",
    "flow",
    "react",
    "strict"
  ]
}