python-crossbar: bump to version 18.9.2

Update dependencies (and fix alphabetical order).
Add patch to remove idna direct dependency (was sent to upstream too:
https://github.com/crossbario/crossbar/pull/1406).

Fixes:
http://autobuild.buildroot.org/results/31d/31db5fd90514906a8c77f921c9650a386ec80101/



Signed-off-by: Asaf Kahlon <asafka7@gmail.com>
Reviewed-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>