Semantic Versioning is important if you have others that depend on your module. First I will discuss how you can achieve this, and more important do this automatically with a maven plugin I created, as there is no way of doing this with current tools available.
Then usually all modules in a repository have the same version number. This is not good if we want to Semantic Version our modules separately. So I will discuss how you can achieve this, so you can create a Maven monorepo with correctly versioned modules. Everything will be shown in a demo application, that is also available on github.