Merge pull request #62 from ScottDuckworth/main

Fix compiler warnings.

Fixed a bug where trying to write SBUS packets with Teensy 3.1/3.2 would hang the processor by de-referencing a null pointer

Updated core to v3.1.3

Updated core to v3.1.2

Updated core to support MMOD

Added option for fast SBUS (200000 baud)

Enabling ESP32 to use non-inverted SBUS

Fixed bug in SBUS timing, added options for non-inverted signals, and simplified the class interfaces.

Merge branch 'array' into 'main'

Using std::array for passing around SBUS data and commands

Merge branch 'cleanup' into 'main'

Pulling in mcu-support repo

More merge cleanup

Cleaning up after the merge