React course out dated?

I found a simple fix that you can use to get exactly the same app structure that mosh has:
npm uninstall create-react-app
npm uninstall -g create-react-app
npm install -g create-react-app@1.5.2
create-react-app --help //to check if installed correctly, should return the help info
create-react-app my-app --scripts-version=react-scripts@1.1.4
cd my-app
npm start

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