update version 3.0.8 to 3.0.9

library.properties

@@ -1,5 +1,5 @@
 name=AirGradient Air Quality Sensor
-version=3.0.8
+version=3.0.9
 author=AirGradient <support@airgradient.com>
 maintainer=AirGradient <support@airgradient.com>
 sentence=ESP32-C3 / ESP8266 library for air quality monitor measuring PM, CO2, Temperature, TVOC and Humidity with OLED display.

src/AirGradient.cpp

@@ -1,6 +1,6 @@
 #include "AirGradient.h"
 
-#define AG_LIB_VER "3.0.8"
+#define AG_LIB_VER "3.0.9"
 
 AirGradient::AirGradient(BoardType type)
     : pms5003(type), pms5003t_1(type), pms5003t_2(type), s8(type), sgp41(type),