<dependency>
  <groupId>org.postgresql</groupId>
  <artifactId>postgresql</artifactId>
  <version>42.3.6</version>
</dependency>

implementation 'org.postgresql:postgresql:42.3.6'

implementation("org.postgresql:postgresql:42.3.6")

libraryDependencies += "org.postgresql" % "postgresql" % "42.3.6"

@Grapes(
  @Grab(group='org.postgresql', module='postgresql', version='42.3.6')
)

<dependency org="org.postgresql" name="postgresql" rev="42.3.6" />

[org.postgresql/postgresql "42.3.6"]

'org.postgresql:postgresql:jar:42.3.6'