Add submission # 5204

#5204

Author: ArduinoBot

registry.txt

@@ -7480,3 +7480,4 @@ https://github.com/MoCoMakers/esp-fipsy.git|Contributed|esp-fipsy
 https://github.com/galarb/ev3lego.git|Contributed|ev3lego
 https://github.com/bitbank2/bb_truetype.git|Contributed|bb_truetype
 https://github.com/nseinlet/Modelisme.git|Contributed|Modelisme
+https://github.com/JensDMadsen/ISRHandler.git|Contributed|ISRHandler