Bump org.postgresql:postgresql from 42.7.2 to 42.7.8

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.7.2 to 42.7.8.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.7.2...REL42.7.8)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-version: 42.7.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

build.gradle

@@ -117,7 +117,7 @@ dependencies {
     implementation "org.apache.commons:commons-collections4:4.5.0"
 
      // driver for postgres
-    runtimeOnly 'org.postgresql:postgresql:42.7.2'
+    runtimeOnly 'org.postgresql:postgresql:42.7.8'
     //driver for h2
     runtimeOnly 'com.h2database:h2:2.3.232'