* Optimized internals

* Improved server-side logging
* Improved handling of expired or otherwise invalidated access tokens
    ** Fixed, and documented the re-authentication support
    ** Added OAuthSessionAuthorizer
    ** Deprecated the JwtKafkaPrincipalBuilder in favor of the new OAuthKafkaPrincipalBuilder
    ** KeycloakRBACAuthorizer improvements
    ** Introduced fast JWKS keys refresh
    ** Fixed exception types thrown during token validation

For more details go to the GitHub release page: https://github.com/strimzi/strimzi-kafka-oauth/releases/tag/0.6.0

Thanks a lot to everyone who contributed to this release by raising issues, opening PRs etc. And especially to Marko who did most of the work!

Thanks & Regards