1.5.8 - 2019.12.30
Core
- SAMD21 Fix freq clipping in SPI.h, allow 24 Mhz SPI
TinyUSB
- Moved TinyUSB core into submodule at https://github.com/adafruit/Adafruit_TinyUSB_ArduinoCore
- Added USBD detach/attach API
- Fixed USB racing condition when mounted via a Hub, accessing external flashes under certain circumstances
- Synced TinyUSB with upstream