expose cycleSpeed for color changing lights

[smatsmats]

lights that have mode COLOR_WHEEL also have a variable speed at which the colors change.

I'll submit a PR that exposes cycleSpeed

{   'color': {'blue': 0, 'green': 0, 'red': 0, 'white': 0},
    'cycleSpeed': 3,
    'exterior': False,
    'intensity': 60,
    'irt': None,
    'mode': 'COLOR_WHEEL',
    'zone': 1}