[Library Manager] Please add MAX30100_milan

[gabriel-milan]

https://github.com/gabriel-milan/Arduino-MAX30100

Please add my MAX30100 library. I've based it on the original MAX30100lib (https://github.com/oxullo/Arduino-MAX30100), slightly changed it for my needs and intend to keep on maintaining it from now on, adding new features.

[cmaglie]

Done.