Latest version of org.specs2:specs2-matcher-extra_2.11
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11
Current version 3.0-M4-20150227014550-82f068c
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/3.0-M4-20150227014550-82f068c
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/org.specs2/specs2-matcher-extra_2.11/3.0-M4-20150227014550-82f068c/package-list