Latest version of org.specs2:specs2-matcher-extra_2.11
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11
Current version 2.4
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/2.4
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/2.4/package-list