Update button holds in README

docs: update README.md

fix: use C++17 for AVR to avoid compilation error

feat: Ult - output select/home instead of d-pad

Merge branch 'master' of github.com:JonnyHaystack/HayB0XX

Update README.md

Fix MultiVersus triggers (#17)

* Send digital triggers as well as analog

* Bind MY + Start to Select

Add missing files for N64 support

Fix C<=53 switch matrix config

Fix disconnects caused by Nunchuk multicore