Reenable bean method proxies

[aburmeis]

fixes #22

[rashtao]

Thanks, @aburmeis ,

can't we just revert it to use @Configuration instead of @AutoConfiguration?

[aburmeis]

@rashtao hmm, @AutoConfiguration is the Boot 3 way so the change was fine. As the inner fixes the problem and this is a very common solution in other boot starters I think we should go that way.