v0.9.2

• added packet callback

v0.9.1

• refactored listener construction

v0.9.0

• reorganized and renamed connack return codes
• support re-subscrible during re-connnect (#11, @ludanfeng)
• reduced default reconnect delay to 50ms from 1s

v0.8.3

• fix counting algorithm

v0.8.2

• added support for go modules
• exposed client.Tracker (@ludanfeng)

v0.8.1

• improved doc
• added retained messages qos downgrade test

v0.8.0

• combined Send and BufferedSend
• various small improvements

v0.7.2

• moved logging to backend

v0.7.1

• removed "Packet" from all packet types

v0.7.0

• let backends handle subscriptions at once
• enabled acknowledgment for subscribe and unsubscribe
• removed will from session
• extracted subscription management from shared session