Log Message:
net/py-paho-mqtt: Update to 1.5.0

Upstream does not include NEWS in the tarball, but on
the web it is possible to find the following:

v1.5.0 - 2019-10-30
===================

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