Update ReactiveArduinoLib.h

Author: luisllamasbinaburo

src/ReactiveArduinoLib.h

@@ -11,7 +11,7 @@ Unless required by applicable law or agreed to in writing, software distributed
 #define _REACTIVEARDUINOLIB_h
 
 #if defined(ARDUINO) && ARDUINO >= 100
-#include "arduino.h"
+#include "Arduino.h"
 #else
 	#include "WProgram.h"
 #endif