GH-2330 - Upgrade to Neo4j 4.2.9.

Closes #2330.

Author: michael-simons

pom.xml

@@ -104,7 +104,7 @@
 		<mockito>${mockito.version}</mockito>
 		<mockito.version>3.10.0</mockito.version>
 		<neo4j-java-driver.version>4.2.7</neo4j-java-driver.version>
-		<neo4j.version>4.2.4</neo4j.version>
+		<neo4j.version>4.2.9</neo4j.version>
 		<objenesis.version>3.0.1</objenesis.version>
 		<project.build.docs>${project.build.directory}/docs</project.build.docs>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>