replace on-finished with stream.finished

[bjohansebas]

on-finished can be replaced by finished, isFinished is still required for future maintainability

[Phillip9587]

I really like the direction of this change - using stream.finished is definitely a cleaner and more modern approach. However, I'd be in favor of implementing this improvement directly within the on-finished package and releasing it as a new major version.

This way, we can centralize the logic, maintain consistency for our packages that depend on on-finished, and allow consumers to benefit from the native stream.finished without having to refactor their own usage across different codebases.

Curious to hear your thoughts on this approach!

[bjohansebas]

Closing since version 3 of on-finished is being worked on.