Use bomr to also handle internal dependencies

[snicoll]

At the moment bomr only handles our public dependency management (in spring-boot-dependencies). It would be very useful that it also handles our internal dependency management, located in spring-boot-parent.

[dreis2211]

Oh yes :)

[aivinog1]

@snicoll Hello, do you mind if I take this? I would like to challenge BOMR and understand how it works.

[philwebb]

@aivinog1 You're more than welcome to take a look, but we don't have a lot of documentation available for BOMR.