Latest version of org.specs2:specs2-matcher-extra_2.11
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11
Current version 3.8.5-20161006092037-b43b121
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/3.8.5-20161006092037-b43b121
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/3.8.5-20161006092037-b43b121/package-list