Publish javadoc and sources alongside code for library

[EndzeitBegins]

We use Concourse CI and the maven-resource to build our JVM projects, including libraries.

However we were not able to upload the sources and javadoc of the libraries alongside the actual implementation jar. Looking at similar requests, e.g. #14 and #35, we seem to not be the only ones with that requirement. Is this possible with the resource in its current form?

If not, I'd gladly make a pull request with the required changes. As far as I know one could "simply" pass the optional arguments "javadoc" and "sources" to mvnw deploy:deploy-file.

Any thoughts on this @patrickcrocker ? Have a nice weekend.