Update sample Makefile for next release number

teensy3/Makefile

@@ -53,7 +53,7 @@ endif
 OPTIONS = -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH -DUSING_MAKEFILE
 
 # options needed by many Arduino libraries to configure for Teensy 3.x
-OPTIONS += -D__$(MCU)__ -DARDUINO=10805 -DTEENSYDUINO=141
+OPTIONS += -D__$(MCU)__ -DARDUINO=10805 -DTEENSYDUINO=143
 
 # use "cortex-m4" for Teensy 3.x
 # use "cortex-m0plus" for Teensy LC