Update environment_sensor.py

Dirigera currently supports adding third-party zigbee sensors, such as aqara temperature sensors. These sensors may not necessarily has pm25 and voc data.

src/dirigera/devices/environment_sensor.py

@@ -1,16 +1,16 @@
 from __future__ import annotations
-from typing import Any, Dict
+from typing import Any, Dict, Optional
 from .device import Attributes, Device
 from ..hub.abstract_smart_home_hub import AbstractSmartHomeHub
 
 
 class EnvironmentSensorAttributes(Attributes):
     current_temperature: float
     current_r_h: int
-    current_p_m25: int
-    max_measured_p_m25: int
-    min_measured_p_m25: int
-    voc_index: int
+    current_p_m25: Optional[int]
+    max_measured_p_m25: Optional[int]
+    min_measured_p_m25: Optional[int]
+    voc_index: Optional[int]
 
 
 class EnvironmentSensor(Device):