Latest version of com.typesafe.akka:akka-protobuf_2.13
https://javadoc.io/doc/com.typesafe.akka/akka-protobuf_2.13
Current version 2.6.5
https://javadoc.io/doc/com.typesafe.akka/akka-protobuf_2.13/2.6.5
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/com.typesafe.akka/akka-protobuf_2.13/2.6.5/package-list