Use latest harness

Author: gnodet

pom.xml

@@ -536,7 +536,7 @@ under the License.
     <dependency>
       <groupId>org.apache.maven.plugin-testing</groupId>
       <artifactId>maven-plugin-testing-harness</artifactId>
-      <version>3.3.0</version>
+      <version>3.4.0-SNAPSHOT</version>
       <scope>test</scope>
     </dependency>
     <dependency>