Cannot run with sound null safety, because the following dependencies don't support null safety

Error: Cannot run with sound null safety, because the following dependencies don't support null safety: - package:english_words For solutions, see https://dart.dev/go/unsound-null-safety https://flutter-ko.dev/docs/get-started/codelab#step-1-create-the-starter-flutter-app 해결 Flutter 앱 튜토리얼을 수행하던 중 발생한 오류입니다. 불안전한 라이브러리 로부터 생긴문제라고 해서 english_words 패키지의 버전을 업그레이드하니 오류가 발생하지 않았습니다. 튜토리얼에서 막히는 일이 발생하지 않기를..!...

원문링크 : Cannot run with sound null safety, because the following dependencies don't support null safety