Upgrade postgres JDBC to 42.4.3.

Also remove separate postgresql version for R2DBC.

Closes #1390

Author: schauder

pom.xml

@@ -36,7 +36,7 @@
 		<mariadb-java-client.version>3.0.7</mariadb-java-client.version>
 		<mssql.version>10.2.1.jre17</mssql.version>
 		<mysql-connector-java.version>8.0.29</mysql-connector-java.version>
-		<postgresql.version>42.4.0</postgresql.version>
+		<postgresql.version>42.4.3</postgresql.version>
 		<oracle.version>19.15.0.0.1</oracle.version>
 
 		<!-- test utilities-->

spring-data-r2dbc/pom.xml

@@ -26,7 +26,6 @@
 		<sonar.dynamicAnalysis>reuseReports</sonar.dynamicAnalysis>
 
 		<degraph-check.version>0.1.4</degraph-check.version>
-		<postgresql.version>42.4.1</postgresql.version>
 		<r2dbc-postgresql.version>1.0.0.RELEASE</r2dbc-postgresql.version>
 		<r2dbc-h2.version>1.0.0.RELEASE</r2dbc-h2.version>
 		<r2dbc-mssql.version>1.0.0.RELEASE</r2dbc-mssql.version>