Update dependency org.postgresql:postgresql to v42.2.26.jre6

Author: mend-for-github-com[bot]

pom.xml

@@ -41,7 +41,7 @@
         <dependency>
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
-            <version>42.2.5</version>
+            <version>42.2.26.jre6</version>
         </dependency>
         <dependency>
             <groupId>com.microsoft.sqlserver</groupId>