Bump org.apache.maven.plugins:maven-source-plugin from 3.3.1 to 3.4.0 (#1035)

Bumps [org.apache.maven.plugins:maven-source-plugin](https://github.com/apache/maven-source-plugin) from 3.3.1 to 3.4.0.
- [Release notes](https://github.com/apache/maven-source-plugin/releases)
- [Commits](apache/maven-source-plugin@maven-source-plugin-3.3.1...maven-source-plugin-3.4.0)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-source-plugin
  dependency-version: 3.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

pom.xml

@@ -66,7 +66,7 @@
     <version.jsonschema2pojo-maven-plugin>1.2.2</version.jsonschema2pojo-maven-plugin>
     <version.javadoc.plugin>3.12.0</version.javadoc.plugin>
     <version.release.plugin>3.2.0</version.release.plugin>
-    <version.source.plugin>3.3.1</version.source.plugin>
+    <version.source.plugin>3.4.0</version.source.plugin>
     <version.surefire.plugin>3.5.4</version.surefire.plugin>
     <version.nexus.plugin>1.7.0</version.nexus.plugin>