Upgrade to MariaDB 3.5.6 and DB2 12.1.3.0 drivers.

Closes #2194

pom.xml

@@ -31,11 +31,11 @@
 
 		<!-- databases and jdbc drivers -->
 		<!-- note that these currently do not control the versions of databases used via Testcontainers for testing -->
-		<db2.version>12.1.2.0</db2.version>
+		<db2.version>12.1.3.0</db2.version>
 		<h2.version>2.3.232</h2.version>
 		<hikari.version>5.1.0</hikari.version>
 		<hsqldb.version>2.7.3</hsqldb.version>
-		<mariadb-java-client.version>3.5.5</mariadb-java-client.version>
+		<mariadb-java-client.version>3.5.6</mariadb-java-client.version>
 		<mssql.version>13.2.0.jre11</mssql.version>
 		<mysql-connector-java.version>9.4.0</mysql-connector-java.version>
 		<postgresql.version>42.7.8</postgresql.version>