* Add Client/Channel#setImplicitSubscription methods to have support for RabbitMQ temp queue destinations
* Add ChannelPool#close method
* Add support for aborting reconnect
* Add optional headers parameter to unsubscribe function

Fixes:
* Fix unsubscribe on Channel when called before client connected
* Support version specific header encoding
* Update qs module to fix security issue
* Set error.connectArgs on failover connection errors