`create-react-app` 4.0.2, which is behind the latest release (4.0.3). 해결하는 방법

create-react-app 시 에러 발생

ou are running `create-react-app` 4.0.2, which is behind the latest release (4.0.3).
We no longer support global installation of Create React App.

해결방법 (순서대로 진행하세요)

1. npm uninstall -g create-react-app 실행
2. npm add create-react-app 실행
3. npx create-react-app myapp 실행