chore(deps): bump postgresql from 42.3.4 to 42.4.0

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.3.4 to 42.4.0.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.3.4...REL42.4.0)

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

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

build.gradle

@@ -80,7 +80,7 @@ dependencies {
     testImplementation group: 'org.mariadb.jdbc', name: 'mariadb-java-client', version: '2.7.2'
     testImplementation group: 'mysql', name: 'mysql-connector-java', version: '8.0.26'
     testImplementation group: 'org.xerial', name: 'sqlite-jdbc', version: '3.36.0.3'
-    testImplementation group: 'org.postgresql', name: 'postgresql', version: '42.3.4'
+    testImplementation group: 'org.postgresql', name: 'postgresql', version: '42.4.0'
 
     testImplementation 'org.junit.jupiter:junit-jupiter:5.+'
     testImplementation "org.mockito:mockito-core:3.+"