Bump postgresql in /src/it/it-property-updates-report-002-slow

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.2.6 to 42.4.1.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.2.6...REL42.4.1)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

src/it/it-property-updates-report-002-slow/pom.xml

@@ -18,7 +18,7 @@
     <httpclient.version>4.5.2</httpclient.version>
     <jackson.version>2.6.7.3</jackson.version>
     <mariadb-client.version>2.4.3</mariadb-client.version>
-    <postgresql-client.version>42.2.6</postgresql-client.version>
+    <postgresql-client.version>42.4.1</postgresql-client.version>
     <groovy.version>2.0.0</groovy.version>
   </properties>