Bump postgresql from 42.4.1 to 42.4.3 in /parent

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:development
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/parent/pom.xml b/parent/pom.xml
index dda6ab1..3711371 100644
--- a/parent/pom.xml
+++ b/parent/pom.xml
@@ -35,7 +35,7 @@
         <version.java>11</version.java>
         <version.guava>20.0</version.guava>
         <version.javax.annotation-api>1.3.2</version.javax.annotation-api>
-        <version.postgres>42.4.1</version.postgres>
+        <version.postgres>42.4.3</version.postgres>
         <version.jctools>3.3.0</version.jctools>
 
         <version.maven.compiler>3.8.1</version.maven.compiler>