Interceptors are deprecated and sometimes removed but are still in the documentation

Interceptors are deprecated and sometimes removed as stated in the change log: https://github.com/kotlintest/kotlintest/blob/master/CHANGELOG.md

But they are still explained as the only way of executing code before or after a test in the documentation: https://github.com/kotlintest/kotlintest/blob/master/doc/reference.md#intercepting-a-test-case

Moreover, the documentation says nothing about beforeTest and afterTest listener methods.

[sksamuel]

I’ve updated the documentation to cover listeners now.

[stephenjfox]

Open under #376