Create a BOM?

[mechite]

(see avaje/avaje-jex#306)

EDIT:
We have BOM for Heildon (io.avaje:avaje-nima-bom) & Jex (io.avaje:avaje-jex-parent) users, capturing all other Avaje libraries.
Javalin (in here?) & Sigma (in avaje-sigma repo) BOMs might be desired?