Do not use typenum since seems no more maintained

[dibericky]

This crate uses typenum as dependency but that one seems no more maintained (last commit on December 2021) and has issues with Mac OS Apple Silicon: paholg/typenum#182

I'd suggest to not use it in order to make generic-array usable on Apple Silicon

[novacrazy]

typenum is a fundamental component of generic-array. Literally not possible without it.

What you linked to is actually an internal compiler error, which should be reported to the Rust compiler project instead.

[paholg]

FYI: typenum is not unmaintained, it's just very stable. And folks still contribute new features from time to time.