Created by: viankakrisna
I'm often cleaning my node_modules and reinstall it with yarn, and i notice that it always creates a new yarn.lock file. I think we should decide wether we want yarn.lock on the root of this project or not.
If we want to add it it, i'll close this and do https://github.com/facebookincubator/create-react-app/pull/2012 instead.