Update deprecated MDI icon name

Resolves: #27

Author: MartyTremblay

custom_components/airthings_wave/sensor.py

@@ -116,7 +116,7 @@ def get_extra_attributes(self, data):
                             "temperature":Sensor(TEMP_CELSIUS, None, DEVICE_CLASS_TEMPERATURE, None),
                             "humidity": Sensor(PERCENT, None, DEVICE_CLASS_HUMIDITY, None),
                             "rel_atm_pressure": Sensor(ATM_METRIC_UNITS, None, DEVICE_CLASS_PRESSURE, None),
-                            "co2": Sensor(CO2_METRIC_UNITS, None, DEVICE_CLASS_CO2, 'mdi:periodic-table-co2'),
+                            "co2": Sensor(CO2_METRIC_UNITS, None, DEVICE_CLASS_CO2, 'mdi:molecule-co2'),
                             "voc": Sensor(VOC_METRIC_UNITS, None, DEVICE_CLASS_VOC, 'mdi:cloud'),
                             "illuminance": Sensor(ILLUMINANCE_LUX, None, DEVICE_CLASS_ILLUMINANCE, None),
                             "accelerometer": Sensor(SPEED_METRIC_UNITS, None, DEVICE_CLASS_ACCELEROMETER, 'mdi:vibrate'),