python-pyzmq: bump to version 14.3.1

> Warning: Users of Python 3.4 should not use pyzmq < 14.3,
> due to changes in garbage collection.

Plus, there's some interesting stuff in 14.x.

Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>