Add submission # 6399

#6399

Author: ArduinoBot

registry.txt

@@ -8193,3 +8193,4 @@ https://github.com/stm32duino/LSM6DSV16BX-TDM.git|Contributed|STM32duino LSM6DSV
 https://github.com/sparkfun/SparkFun_AS7343_Arduino_Library.git|Contributed|SparkFun AS7343 Arduino Library
 https://github.com/manoj26may/CodePrinter.git|Contributed|CodePrinter
 https://github.com/fiskbil/PressureTransducer.git|Contributed|PressureTransducer
+https://github.com/cearto/SlipPump.git|Contributed|SlipPump