Compatibility with SLF4J 2.0

[mthmulders]

First of all, thank you for maintaining this very useful utility!

Unfortunately, starting with SLF4J 2.0, it doesn't work anymore. SLF4J 2.0 changed the way it discovers implementations. Quoting from their documentation:

Instead of "bindings" now org.slf4j.LoggerFactory searches for "providers".

Although I'm not an expert on SLF4J, I managed to implement such a provider. If you're open to such a contribution, I can create a PR for it.

[valfirst]

@mthmulders here is a fork with SLF4J 2.0 support: https://github.com/valfirst/slf4j-test

[Hakky54]

This is also an alternative for slf4j-test which works with slf4j 2.0 https://github.com/Hakky54/log-captor