fix: upgrade org.postgresql:postgresql from 42.6.0 to 42.7.3 (#190)

Snyk has created this PR to upgrade org.postgresql:postgresql from 42.6.0 to 42.7.3.

See this package in maven:
org.postgresql:postgresql

See this project in Snyk:
https://app.snyk.io/org/wistefan/project/e4d0b1c1-93aa-4ea9-83e8-7ddc06ac5363?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <[email protected]>

Author: wistefan

pom.xml

@@ -98,7 +98,7 @@
         <spotbugs.reportFolder>${project.build.directory}/site/spotbugs</spotbugs.reportFolder>
 
         <!-- persistence -->
-        <version.org.postgresql>42.6.0</version.org.postgresql>
+        <version.org.postgresql>42.7.3</version.org.postgresql>
 
     </properties>