fix: upgrade org.postgresql:postgresql from 42.7.8 to 42.7.9

Snyk has created this PR to upgrade org.postgresql:postgresql from 42.7.8 to 42.7.9.

See this package in maven:
org.postgresql:postgresql

See this project in Snyk:
https://app.snyk.io/org/luis100/project/00ce1680-cb9d-4f6d-9e26-63a283d28ead?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

dbptk-modules/dbptk-module-postgresql/pom.xml

@@ -29,7 +29,7 @@
         <dependency>
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
-            <version>42.7.8</version>
+            <version>42.7.9</version>
         </dependency>
     </dependencies>
 </project>