Merge pull request #5 from eXist-db/dependabot/maven/org.postgresql-postgresql-42.3.1

Bump postgresql from 42.2.9 to 42.3.1

Author: lcahlander

pom.xml

@@ -64,7 +64,7 @@
         <dependency>
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
-            <version>42.2.9</version>
+            <version>42.3.1</version>
         </dependency>
 
         <!-- test dependencies -->