In order to reproduce and test maven extensions with Renovate
At the time of writting the extension should be bumped to 1.7
at least.
If you add the dependency on the pom
<dependencies>
<dependency>
<groupId>io.jenkins.tools.incrementals</groupId>
<artifactId>git-changelist-maven-extension</artifactId>
<version>1.6</version>
</dependency>
</dependencies>
Renovate is able to to bump it. But not as a maven extension 😞