Bump org.postgresql:postgresql from 42.6.0 to 42.7.0 (#1593)

Author: dependabot[bot]

pom.xml

@@ -281,7 +281,7 @@
     <dependency>
       <groupId>org.postgresql</groupId>
       <artifactId>postgresql</artifactId>
-      <version>42.6.0</version>
+      <version>42.7.0</version>
       <scope>test</scope>
     </dependency>
   </dependencies>