How to inform users of a composer package about a version change that breaks backwards compatibility?

Question

Yii

Hello. There is a Yii2 extension written by me that is distributed through Composer. I wrote a long time ago, now I decided to refactor and cover with tests. In the process, there are many class and method relocations that break backward compatibility. If one of the installed users executes composer update, then after that a bunch of errors will appear in the project. How to warn the user about this? Is it possible to output composer updatesome message to the console when executing?

Answer 1

change the major version.