Added water heater appliance. Added ability to send only mandatory parameters

pyhon/appliances/wh.py

@@ -0,0 +1,8 @@
+from typing import Any, Dict
+
+from pyhon.appliances.base import ApplianceBase
+
+class Appliance(ApplianceBase):
+    def attributes(self, data: Dict[str, Any]) -> Dict[str, Any]:
+        data = super().attributes(data)
+        data["active"] = data.get("onOffStatus") == 1