Bump org.codehaus.plexus:plexus-testing from 1.5.0 to 1.6.0

Bumps [org.codehaus.plexus:plexus-testing](https://github.com/codehaus-plexus/plexus-testing) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/codehaus-plexus/plexus-testing/releases)
- [Commits](codehaus-plexus/plexus-testing@plexus-testing-1.5.0...plexus-testing-1.6.0)

---
updated-dependencies:
- dependency-name: org.codehaus.plexus:plexus-testing
  dependency-version: 1.6.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -56,7 +56,7 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-testing</artifactId>
-      <version>1.5.0</version>
+      <version>1.6.0</version>
       <scope>test</scope>
     </dependency>
   </dependencies>