Bump org.postgresql:postgresql from 42.4.3 to 42.7.2 in /cygnus-common

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.4.3 to 42.7.2.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pgjdbc/pgjdbc/commits)

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

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

cygnus-common/pom.xml

@@ -82,7 +82,7 @@
         <dependency>
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
-            <version>42.4.3</version>
+            <version>42.7.2</version>
             <type>jar</type>
         </dependency>
         <!-- Required by OracleSQLBackendImpl at runtime -->