<dependency>
  <groupId>org.specs2</groupId>
  <artifactId>specs2-matcher_2.12</artifactId>
  <version>4.13.3</version>
</dependency>

implementation 'org.specs2:specs2-matcher_2.12:4.13.3'

implementation("org.specs2:specs2-matcher_2.12:4.13.3")

libraryDependencies += "org.specs2" % "specs2-matcher_2.12" % "4.13.3"

@Grapes(
  @Grab(group='org.specs2', module='specs2-matcher_2.12', version='4.13.3')
)

<dependency org="org.specs2" name="specs2-matcher_2.12" rev="4.13.3" />

[org.specs2/specs2-matcher_2.12 "4.13.3"]

'org.specs2:specs2-matcher_2.12:jar:4.13.3'