Latest version of io.vertx:vertx-core
https://javadoc.io/doc/io.vertx/vertx-core
Current version 2.1M2
https://javadoc.io/doc/io.vertx/vertx-core/2.1M2
package-list path (used for javadoc generation -link option)
https://javadoc.io/doc/io.vertx/vertx-core/2.1M2/package-list