• Add new boards: ST 32L100DISCOVERY, ST Nucleo F439ZI, ST 32L496GDISCOVERY, Nucleo F756ZG, Nucleo L433RC-P, Nucleo L476RG, Nucleo L496ZG-P, ST Sensor Node, u-blox C030-R410M IoT, Seeed Wio 3G
• Arduno core support for Maple RET6 board, Microduino, generic STM32F103T*, STM32F103V B/D, STM32F103Z C/D/E
• Update mbed to 5.9.4
• Update STM32Duino Core to #d4b3cd11
• Drop mbed support from ST Nucleo L011K4