Latest version of org.specs2:specs2-matcher-extra_2.11
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11
Current version 3.7.2-20160329210905-a3be17f
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/3.7.2-20160329210905-a3be17f
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/3.7.2-20160329210905-a3be17f/package-list