Improvement: avoid declaring Lombok as a transitive dependency

[jaguililla]

In the latest release (9.1.0) the Lombok dependency is included, however, it won't be needed at runtime ¿could it be set as "compile only"?

Thanks for your great library!

[jmrozanec]

@jaguililla sure, we can do that! If you send a PR with the change, we will be glad to merge it. Thanks! 😄

[jaguililla]

The proposed change is in the #438 PR.