class Serf < Cask url 'https://dl.bintray.com/mitchellh/serf/0.6.1_darwin_amd64.zip' homepage 'http://www.serfdom.io/' version '0.6.1' sha256 'e672fb1f59abd88db15c0c66daec825b6263a04386918106e3468162abc9e5c4' binary 'serf' end