Bump org.apache.maven.plugins:maven-source-plugin from 3.3.1 to 3.4.0

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
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -60,7 +60,7 @@
         <version.maven-compiler-plugin>3.14.1</version.maven-compiler-plugin>
         <version.maven-jar-plugin>3.5.0</version.maven-jar-plugin>
         <version.maven-javadoc-plugin>3.12.0</version.maven-javadoc-plugin>
-        <version.maven-source-plugin>3.3.1</version.maven-source-plugin>
+        <version.maven-source-plugin>3.4.0</version.maven-source-plugin>
         <version.maven-gpg-plugin>3.2.8</version.maven-gpg-plugin>
         <version.maven-release-plugin>3.2.0</version.maven-release-plugin>
         <version.maven-scm-publish-plugin>3.0.0</version.maven-scm-publish-plugin>