Bump postgresql from 42.4.1 to 42.4.3 in /src (#446)

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.4.1 to 42.4.3.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.4.1...REL42.4.3)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/pom.xml

@@ -178,7 +178,7 @@
         <javassist.version>3.26.0-GA</javassist.version>
         <objenesis.version>2.6</objenesis.version>
 
-        <postgresql.version>42.4.1</postgresql.version>
+        <postgresql.version>42.4.3</postgresql.version>
 
         <!-- Other -->
         <imgscalr.version>4.2</imgscalr.version>