Make sure you have a gpg key installed and uploaded to a keyserver such as https://sks-keyservers.net/i/
Make sure your sonatype credentials are in your maven settings.xml:
<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="https://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="https://maven.apache.org/SETTINGS/1.0.0 https://maven.apache.org/xsd/settings-1.0.0.xsd">
<servers>
<server>
<id>sonatype-nexus-staging</id>
<username>raboof</username>
<password>*********</password>
</server>
</servers>
<pluginGroups></pluginGroups>
<proxies></proxies>
<mirrors></mirrors>
<profiles></profiles>
</settings>
Then:
- mvn release:prepare
- mvn release:perform
- git push --tags
- finalize the release as described at https://central.sonatype.org/pages/releasing-the-deployment.html