✨ feat: upgrade to Kafka 4.x

[gaeljw]

Resolves #541

[Dichotomia]

Hi,
Good work !
I think that the use of https://github.com/confluentinc/schema-registry/releases/tag/v8.0.0 would help.

[gaeljw]

I don't have much time to work on this currently. If anyone wants to give it a look, feel free. Tests are hanging ; probably some configuration issue somewhere.

[Dichotomia]

Hello @gaeljw, this pull request should fix the problem with the tests #555

[gaeljw]

@Dichotomia I've included your change, it seems tests are still hanging indefinitely. But it also seems tests are succesful ; maybe a subprocess/thread is still running and not closed properly.

[Dichotomia]

Ok the tests are now successful locally on my computer.

[Dichotomia]

Hi.

We could merge the PR about plugin / dependency updates proposed by steward and renovate first ?

[gaeljw]

@Dichotomia sure, I was not notified there was some pending PRs, will check my settings!

[gaeljw]

@Dichotomia good news, tests are passing on the CI now. There was one place where I missed to changed a port and there was a conflict.

I don't have any "real project" at work or somewhere else to do some kind of integration testing. I will trust the unit tests and cut a release :)