[Library Manager] Please add CarreraDigitalControlUnit library

[tkem]

This is a cross-platform library for Arduino and mbed OS for interfacing a microcontroller board with the Carrera® DIGITAL 124/132 slot car racing system.

https://github.com/tkem/CarreraDigitalControlUnit
https://github.com/tkem/CarreraDigitalControlUnit/releases/tag/0.1.0

[cmaglie]

Done!

[tkem]

Thanks!