Fix implementation of set_rgbw.

[rpavlik]

I tried to run the example with my "LD-0003" device from Five Below, and I got an exception in the set_rgbw call. Looks like it was trying to maybe pass None for both of the "white" params, when the rgbw expands to already include one of them?

[bdraco]

Can you provide a link to where you purchased the device?

[rpavlik]

I got it quite a while ago, I don't think they sell it anymore. It's not on their web site except via search engine. "Lumin" Smart Light, FCC ID 2ADM5-LD-0003. https://www.fivebelow.com/products/lumin-bluetooth-smart-light-w-app-control

But regardless, the bug still exists in the underlying code, that's independent of what device it's used with. All you have to do is modify the example to specify your device's address and run it.

[bdraco]

Found one on ebay. I'll test the change when it arrives

[rpavlik]

The device is rather immaterial to this fix. Any device would show this, it's literally a syntax error?

[bdraco]

The device is rather immaterial to this fix. Any device would show this, it's literally a syntax error?

There are no tests for the library, and this PR doesn't add tests for this case so it should be independently tested manually instead.

[bdraco]

Its a bit unexpected that the linters didn't catch the tuple unpack. I switched it to use kwargs instead #53 so it can't happen

[rpavlik]

oh even better, good idea.