Bump org.apache.maven.plugin-testing:maven-plugin-testing-harness (#854)

Bumps org.apache.maven.plugin-testing:maven-plugin-testing-harness from 3.5.0 to 3.5.1.

---
updated-dependencies:
- dependency-name: org.apache.maven.plugin-testing:maven-plugin-testing-harness
  dependency-version: 3.5.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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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>3.5.0</version>
+            <version>3.5.1</version>
             <scope>test</scope>
         </dependency>