Pin listen to a working pre-ruby2.2 version
Pin listen to a working pre-ruby2.2 version

It looks like guard requires listen. Listen has been updated to only
support ruby >= 2.2.x. The last version of listen to work on ruby >=
1.9.3 was 3.0.x. This pins the version of listen so development
dependencies can be installed on ruby 2.1.x.

bodgit/sensu-puppet,bovy89/sensu-puppet,wywygmbh/sensu-puppet,wywygmbh/sensu-puppet,sensu/sensu-puppet,jaxxstorm/sensu-puppet,RiRa12621/sensu-puppet,jaxxstorm/sensu-puppet,bodgit/sensu-puppet,dzeleski/sensu-puppet,rabidsloth/jenkins_test,sensu/sensu-puppet,jaxxstorm/sensu-puppet,rabidsloth/jenkins_test,bodgit/sensu-puppet,rabidsloth/jenkins_test,sensu/sensu-puppet,bovy89/sensu-puppet,dzeleski/sensu-puppet,dhgwilliam/sensu-puppet,jeffmccune/sensu-puppet,RiRa12621/sensu-puppet,dhgwilliam/sensu-puppet,jeffmccune/sensu-puppet,madelaney/sensu-puppet,jeffmccune/sensu-puppet,wywygmbh/sensu-puppet,dzeleski/sensu-puppet,RiRa12621/sensu-puppet,bovy89/sensu-puppet,madelaney/sensu-puppet,dhgwilliam/sensu-puppet,madelaney/sensu-puppet