Note that this is now automated via github actions.
Basically this is how it goes:
mvn -Pdeploy release:prepare release:perform -B
Snapshots are deployed to sonatype.
releases can be put quicker to nexus.vpro.nl like this:
git checkout 2.8
mvn -DaltDeploymentRepository=nexusvpro::http://nexus.vpro.nl/content/repositories/releases deploy