Build issues on macOS

[thewh1teagle]

1. espeakingng-sys required runtime feature from bindgen on macOS m1 otherwise it failed to build with missing libclang error

After patching sys crate

ld: library 'espeak-ng' not found

Do we need install it manually?

I'm looking for a crate that can built on macOS / Linux / Windows without install dependencies manually. maybe we can improve this library. I came too from the rubato crate to here since it's not released to crates.io

Update: it has a feature to fix the first issue

https://github.com/Better-Player/espeakng-sys/blob/master/Cargo.toml#L16C1-L16C14

Maybe I'll create new crate for espeak-ng-sys which automatically build it from source instead of relaying on system installed espeak-ng. let me know if you want it.