Bump postgresql from 42.3.6 to 42.4.0

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.3.6 to 42.4.0.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pgjdbc/pgjdbc/compare/REL42.3.6...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] <support@github.com>

build.gradle

@@ -56,7 +56,7 @@ ext {
         //datasource
         "p6spy"                      : "p6spy:p6spy:3.9.1",
         "sqlserver"                  : "com.microsoft.sqlserver:sqljdbc4:4.0",
-        "postgresql"                 : "org.postgresql:postgresql:42.3.6",
+        "postgresql"                 : "org.postgresql:postgresql:42.4.0",
         "oracle"                     : fileTree(dir: 'libs', includes: ['ojdbc-11.2.0.3-jdk16.jar']),
         "dm"                         : fileTree(dir: 'libs', includes: ["jdbcDriver-18.jar"]),
         "kingbase"                   : fileTree(dir: 'libs', includes: ["kingbase8-8.2.0.jar"]),