Latest version of org.specs2:specs2-matcher-extra_2.11
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11
Current version 2.3.13-scalaz-7.1.0-RC1
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/2.3.13-scalaz-7.1.0-RC1
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/2.3.13-scalaz-7.1.0-RC1/package-list