Bump org.postgresql:postgresql from 42.7.7 to 42.7.8 (#1818)

Author: dependabot[bot]

pom.xml

@@ -293,7 +293,7 @@
     <dependency>
       <groupId>org.postgresql</groupId>
       <artifactId>postgresql</artifactId>
-      <version>42.7.7</version>
+      <version>42.7.8</version>
       <scope>test</scope>
     </dependency>
   </dependencies>