Fix warning

Author: jamo

pom.xml

@@ -212,6 +212,7 @@
             <plugin>
               <groupId>org.apache.maven.plugins</groupId>
               <artifactId>maven-source-plugin</artifactId>
+              <version>3.0.1</version>
               <executions>
                 <execution>
                   <id>attach-sources</id>
@@ -271,5 +272,5 @@
             </build>
         </profile>
     </profiles>
-    
+
 </project>