If you have an app bootstrapped with [create-react-app](https://github.com/facebook/create-react-app), you may have a certain amount of boilerplate code that came with it, especially if you ejected. Now you may want to sync up with the latest changes in create-react-app. I've ported [ember-cli-update](https://github.com/ember-cli/ember-cli-update) to [create-react-app-updater](https://github.com/kellyselden/create-react-app-updater) to get the same benefits for react apps. You can keep your pojects in sync as well as run codemods based on react version.