Bump postgresql from 42.4.1 to 42.4.3 in /jdbc (#4517)

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](https://github.com/pgjdbc/pgjdbc/compare/REL42.4.1...REL42.4.3)

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

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diff --git a/jdbc/pom.xml b/jdbc/pom.xml
index 130c843..e35c5f8 100644
--- a/jdbc/pom.xml
+++ b/jdbc/pom.xml
@@ -34,7 +34,7 @@
   <properties>
     <!--library versions-->
     <interpreter.name>jdbc</interpreter.name>
-    <postgresql.version>42.4.1</postgresql.version>
+    <postgresql.version>42.4.3</postgresql.version>
     <hadoop.version>${hadoop3.1.version}</hadoop.version>
     <h2.version>2.0.206</h2.version>
     <commons.dbcp2.version>2.0.1</commons.dbcp2.version>