Created by: sotojuan
See https://github.com/facebookincubator/create-react-app/issues/570#issuecomment-244588738, though it may not be needed as the issue was closed.
I couldn't find a way to put it in its own file and have both global-cli/index.js and the stuff under scripts/ use it (I kept getting errors that the file was not found in the CLI) so I just put in the file that needed it :p