[Feature] Support TCP protocol

[normen]

Especially with the old v3 (and older) version of the Milight boxes the UDP protocol leaves much to be desired as - depending on the network connection - it often misses packets and the lights don't react properly.

Most base stations allow switching to the TCP protocol via the web interface. This should maybe allow a more stable connection.

Thanks for this plugin, it really is a center piece of my HomeKit setup.

[mwittig]

I am happy to take this one as part of Node-milight-promise

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