<dependency>
  <groupId>org.postgresql</groupId>
  <artifactId>postgresql</artifactId>
  <version>42.2.18</version>
</dependency>

implementation 'org.postgresql:postgresql:42.2.18'

implementation("org.postgresql:postgresql:42.2.18")

libraryDependencies += "org.postgresql" % "postgresql" % "42.2.18"

@Grapes(
  @Grab(group='org.postgresql', module='postgresql', version='42.2.18')
)

<dependency org="org.postgresql" name="postgresql" rev="42.2.18" />

[org.postgresql/postgresql "42.2.18"]

'org.postgresql:postgresql:jar:42.2.18'