Use latest javadoc version

Author: johspaeth

pom.xml

@@ -63,7 +63,7 @@
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
 						<artifactId>maven-javadoc-plugin</artifactId>
-						<version>3.2.1</version>
+						<version>3.6.0</version>
 						<executions>
 							<execution>
 								<id>attach-javadoc</id>