Created by: thtliife
When creating an app using yarn / yarnpkg, some binaries do not get properly linked, causing the Jest test scripts to fail. If yarn is used after using npm for the initial build, everything seems to work fine. The issue to track regarding yarn binaries should be https://github.com/yarnpkg/yarn/issues/648
This PR adds a --disable-yarn option, which will force the initial build to use npm.