The following steps describe how to release dbUnit. While the Maven release plugin automates steps such as version change, commit, and deploy, dbUnit has manual file information update steps that are outside of its scope.
While the below steps do not use the Maven release plugin, you can use it by performing the manual file edits first then running the release plugin steps.
mvn clean mvn deploy -Psonatype-oss-release
mvn site
ssh -t sf-username,dbunit@shell.sourceforge.net create mvn site:deploy
mvn changes:announcement-generate -Dchanges.version=theNewVersion
Review and adjust the text as desired before using.