Add light presets common module to devices. (#907)

Adds light preset common module for switching to presets and saving presets.
Deprecates the `presets` attribute and `save_preset` method from the `bulb` 
interface in favour of the modular approach.  Allows setting preset for `iot` 
which was not previously supported.

kasa/iot/iotdevice.py

@@ -312,11 +312,13 @@ class IotDevice(Device):
 
         await self._modular_update(req)
 
+        self._set_sys_info(self._last_update["system"]["get_sysinfo"])
+        for module in self._modules.values():
+            module._post_update_hook()
+
         if not self._features:
             await self._initialize_features()
 
-        self._set_sys_info(self._last_update["system"]["get_sysinfo"])
-
     async def _initialize_modules(self):
         """Initialize modules not added in init."""