Add submission # 2421

#2421

Author: ArduinoBot

registry.txt

@@ -5643,3 +5643,4 @@ https://github.com/uStepper/uStepperS32.git|Contributed|uStepperS32
 https://github.com/RobTillaart/HC4051.git|Contributed|HC4051
 https://github.com/RobTillaart/HC4052.git|Contributed|HC4052
 https://github.com/RobTillaart/HC4053.git|Contributed|HC4053
+https://github.com/sparkfun/SparkFun_WM8960_Arduino_Library.git|Contributed|SparkFun WM8960 Arduino Library