crash when sending 2 commands at the same time

[tikismoke]

Publishing 2 value at the same time i got:

Connected to: KLF 200: Software version: 0.2.0.0.71.0, hardware version: 5, protocol version: 3.14
Traceback (most recent call last):
  File "vlx2mqtt.py", line 196, in <module>
    LOOP.run_until_complete(main(LOOP))
  File "/usr/lib/python3.5/asyncio/base_events.py", line 466, in run_until_complete
    return future.result()
  File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
    raise self._exception
  File "/usr/lib/python3.5/asyncio/tasks.py", line 239, in _step
    result = coro.send(None)
  File "vlx2mqtt.py", line 174, in main
    for name, value in nodes.items():
RuntimeError: dictionary changed size during iteration