- Update to version 1.4.0:
* Fix hang when client restarted and broker resumed a session
with Qos2 message.
* Fix reconnection loop when a clean_session=True client
reconnect while Qos2 message are being sent.
* Catch and log any exception raised by user callback.
* Improve support for external event loop (like asyncio).
* Fix order of message with publish.multiple helper.
* Fix hang on wait_for_published() on bad network.
* Fix issue with Websocket payload size between 127 and 65536.
* Closes socket in client destructor to avoid FD leak.
* Fix uncaught timeout exception during connection.
* Remove dup flag on PUBREL packet.
* Use secure entropy source for Websocket mask_key (urandom).
* Fix mid generation that was not thread-safe.
* Replace print() statements with proper logging.
* Allow insecure TLS on publish and subscribe helpers.
* Allow to remove authentication (reset username to None).
* Add support for the non-standard bridge mode.