Add support for lightstrips (KL430) (#74)

* Preliminary support for light strips

* Add color temperature range and cleanup, thanks to @darkoppressor

* Use lightstrip instead of {led,light}strip consistently everywhere
* The cli flag is now --lightstrip

* add apidocs

* Add fixture file for KL430

Signed-off-by: Kevin Wells <darkoppressor@gmail.com>

* Add discovery support, expose effect and length of the strip

* use set_light_state instead of transition_light_state

* Add tests for lightstrip

* add doctests

* Add KL430 to supported devices in README

Co-authored-by: Kevin Wells <darkoppressor@gmail.com>

kasa/tests/test_bulb.py

@@ -24,8 +24,10 @@ async def test_bulb_sysinfo(dev):
 
     assert dev.model is not None
 
-    assert dev.device_type == DeviceType.Bulb
-    assert dev.is_bulb
+    # TODO: remove special handling for lightstrip
+    if not dev.is_light_strip:
+        assert dev.device_type == DeviceType.Bulb
+        assert dev.is_bulb
 
 
 @bulb