Bump maven-source-plugin from 3.2.0 to 3.2.1 (#251)

Bumps [maven-source-plugin](https://github.com/apache/maven-source-plugin) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/apache/maven-source-plugin/releases)
- [Commits](apache/maven-source-plugin@maven-source-plugin-3.2.0...maven-source-plugin-3.2.1)

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

pom.xml

@@ -84,7 +84,7 @@
          -->
         <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
         <maven-failsafe-plugin.version>2.20.1</maven-failsafe-plugin.version>
-        <maven-source-plugin.version>3.2.0</maven-source-plugin.version>
+        <maven-source-plugin.version>3.2.1</maven-source-plugin.version>
         <maven-javadoc-plugin.version>3.1.1</maven-javadoc-plugin.version>
         <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
         <maven-scm-plugin.version>1.11.2</maven-scm-plugin.version>