Doesn't seem to work with JDK 11

  [ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.2.0:jar (attach-javadocs) on project neo4j-jdbc: MavenReportException: Error while generating Javadoc:
11:55:50
  [ERROR] Exit code: 1 - javadoc: error - The code being documented uses modules but the packages defined in https://docs.oracle.com/javase/8/docs/api/ are in the unnamed module.
11:55:50
  [ERROR]
11:55:50
  [ERROR] Command line was: /usr/local/openjdk-11/bin/javadoc @options @packages

Revert "jdk 11"

This reverts commit b4ec9ca.

pom.xml

@@ -285,7 +285,7 @@
 					</execution>
 				</executions>
 				<configuration>
-					<source>11</source>
+					<source>8</source>
 				</configuration>
 			</plugin>
 		</plugins>