Update dependency org.apache.maven.plugins:maven-source-plugin to v3.4.0

Author: pschichbot

pom.xml

@@ -147,7 +147,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-source-plugin</artifactId>
-                        <version>3.3.1</version>
+                        <version>3.4.0</version>
                         <executions>
                             <execution>
                                 <id>attach-sources</id>