- Update to version 1.5.0:
* Add support for clean_session on subscribe helper
(gh#eclipse/paho.mqtt.python#219).
* Add support for non-standard bridge connection
(gh#eclipse/paho.mqtt.python#282).
* Fix hang with QoS 2 message and clean_session = False. The fix
replace hang with message DROP. See README for known
limitation (gh#eclipse/paho.mqtt.python#284,
gh#eclipse/paho.mqtt.python#286).
* Fix connection establishement timeout
(gh#eclipse/paho.mqtt.python#291,
gh#eclipse/paho.mqtt.python#288).
* Add support for connecting through a proxy
(gh#eclipse/paho.mqtt.python#315).
* Add MQTT v5 support (gh#eclipse/paho.mqtt.python#334).
* Improve error message when sending queue is full
(gh#eclipse/paho.mqtt.python#378).
* Improve error handling during initialization on edge case
(gh#eclipse/paho.mqtt.python#387,
gh#eclipse/paho.mqtt.python#388).
* Allow to specify local client port used (similar to
bind_address) (gh#eclipse/paho.mqtt.python#390).
* Add method is_connected to know if MQTT connection is
established (gh#eclipse/paho.mqtt.python#414).
* Set connection timeout to keepalive
(gh#eclipse/paho.mqtt.python#425).