Support Leviton Omnistat2 thermostat (#3249)

* Support Leviton Omnistat2 thermostat

* Update homeassistant.js

Co-authored-by: Koen Kanters <koenkanters94@gmail.com>

lib/extension/homeassistant.js

@@ -1445,6 +1445,7 @@ const mapping = {
     '4512706': [cfg.sensor_battery, cfg.sensor_action],
     'GL-S-004ZS': [cfg.light_brightness_colortemp_colorxy],
     '7121131PU': [cfg.light_brightness_colortemp_colorxy],
+    'RC-2000WH': [cfg.thermostat_heatcool(10, 30, 1, ['auto', 'on', 'smart'])],
 };
 
 Object.keys(mapping).forEach((key) => {