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

@@ -76,7 +76,7 @@
     <maven.release.plugin.version>3.2.0</maven.release.plugin.version>
     <versions.maven.plugin.version>2.20.1</versions.maven.plugin.version>
     <maven.resources.plugin.version>3.3.1</maven.resources.plugin.version>
-    <maven.source.plugin.version>3.3.1</maven.source.plugin.version>
+    <maven.source.plugin.version>3.4.0</maven.source.plugin.version>
     <groovy.maven.plugin.version>2.1.1</groovy.maven.plugin.version>
     <groovy.all.version>2.4.21</groovy.all.version>
     <build.helper.maven-plugin.version>3.6.1</build.helper.maven-plugin.version>