Bump maven-source-plugin from 2.2.1 to 3.2.1 in /PgBulkInsert

Bumps [maven-source-plugin](https://github.com/apache/maven-source-plugin) from 2.2.1 to 3.2.1.
- [Release notes](https://github.com/apache/maven-source-plugin/releases)
- [Commits](apache/maven-source-plugin@maven-source-plugin-2.2.1...maven-source-plugin-3.2.1)

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

Author: dependabot-preview[bot]

PgBulkInsert/pom.xml

@@ -198,7 +198,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-source-plugin</artifactId>
-                        <version>2.2.1</version>
+                        <version>3.2.1</version>
                         <executions>
                             <execution>
                                 <id>attach-sources</id>