Adding current_humidity to attributes if its not None. (#18261)

* Adding current humidity if not None

* Removed the logic in supported feature

* More appropriate placement

homeassistant/components/climate/__init__.py

@@ -249,9 +249,11 @@ class ClimateDevice(Entity):
                 self.hass, self.target_temperature_low, self.temperature_unit,
                 self.precision)
 
+        if self.current_humidity is not None:
+            data[ATTR_CURRENT_HUMIDITY] = self.current_humidity
+
         if supported_features & SUPPORT_TARGET_HUMIDITY:
             data[ATTR_HUMIDITY] = self.target_humidity
-            data[ATTR_CURRENT_HUMIDITY] = self.current_humidity
 
             if supported_features & SUPPORT_TARGET_HUMIDITY_LOW:
                 data[ATTR_MIN_HUMIDITY] = self.min_humidity