teensy-core-4.1

Teensy 4.1 core updated for C++20

PaulStoffregen 4b7151d0e0 Fix compiler warning with Keyboard.set_modifier		pirms 9 gadiem
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core_id.h	Initial commit, version 1.17-rc1	pirms 12 gadiem
usb.c	Mouse extra buttons & horizontal scroll on Teensy 2.0	pirms 9 gadiem
usb_api.cpp	Fix compiler warning with Keyboard.set_modifier	pirms 9 gadiem
usb_api.h	Fix compiler warning with Keyboard.set_modifier	pirms 9 gadiem
usb_private.h	Initial commit, version 1.17-rc1	pirms 12 gadiem