Support for Spring Boot 4

[TKorhonen]

Hello,

With the Spring Boot 4 release expected this month, I was wondering if there are any plans to provide support for it upon release (or shortly after).

Thank you for your work on this project!

[erikpetzold]

see the discussion here: #4539

[Richie94]

@erikpetzold do you have a plan when to release it? so far the last thing keeping me from upgrading to SB4 😀 as far as i see is there also an open PR

[SteKoe]

As stated here, we still struggle with tests before we are willing to release a 4.0.0-M1.