Bump org.apache.maven.plugin-testing:maven-plugin-testing-harness

Bumps org.apache.maven.plugin-testing:maven-plugin-testing-harness from 3.3.0 to 3.4.0.

---
updated-dependencies:
- dependency-name: org.apache.maven.plugin-testing:maven-plugin-testing-harness
  dependency-version: 3.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

celesta-maven-plugin/pom.xml

@@ -66,7 +66,7 @@
         <dependency>
             <groupId>org.apache.maven.plugin-testing</groupId>
             <artifactId>maven-plugin-testing-harness</artifactId>
-            <version>3.3.0</version>
+            <version>3.4.0</version>
             <scope>test</scope>
         </dependency>