Remove addressable, not used in this gem.
Remove addressable, not used in this gem.

Juanmcuello/pusher-ruby-client,mediaslave24/pusher-ruby-client,Intrepidd/pusher-ruby-client,machadolab/pusher-ruby-client,Aaron1011/pusher-ruby-client,rkh/pusher-ruby-client,pusher-community/pusher-websocket-ruby,jarthod/pusher-ruby-client,ericzinnikas/pusher-ruby-client,fukayatsu/pusher-websocket-ruby,emnl/pusher-ruby-client,preplay/pusher-ruby-client