Bump firmware version

Author: WillB97

resources/kit/arduino-fw.ino

@@ -3,7 +3,7 @@
 // We communicate with the Arduino at 115200 baud.
 #define SERIAL_BAUD 115200
 
-#define FW_VER 2
+#define FW_VER 3
 
 void setup() {
   Serial.begin(SERIAL_BAUD);