Bump org.postgresql:postgresql in /exo.jcr.component.ext

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 9.2-1003-jdbc4 to 42.3.9.
- [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/REL42.3.9)

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

Signed-off-by: dependabot[bot] <[email protected]>

exo.jcr.component.ext/pom.xml

@@ -520,7 +520,7 @@
             <dependency>
                <groupId>org.postgresql</groupId>
                <artifactId>postgresql</artifactId>
-               <version>9.2-1003-jdbc4</version>
+               <version>42.3.9</version>
                <scope>test</scope>
             </dependency>
          </dependencies>
@@ -534,7 +534,7 @@
             <dependency>
                <groupId>org.postgresql</groupId>
                <artifactId>postgresql</artifactId>
-               <version>9.3-1102-jdbc4</version>
+               <version>42.3.9</version>
                <scope>test</scope>
             </dependency>
          </dependencies>
@@ -548,7 +548,7 @@
             <dependency>
                <groupId>org.postgresql</groupId>
                <artifactId>postgresql</artifactId>
-               <version>9.4-1203-jdbc4</version>
+               <version>42.3.9</version>
                <scope>test</scope>
             </dependency>
          </dependencies>