Add ability to run on Apple silicon

[human-bean-555]

Hi,

This allows the use of the plugin on macOS with Apple silicon and addresses #24. While the issue has nothing to do with this package (the cause is the wasm-pack npm package will throw on macOS unless arch === "x64"), it provides a work around where the user can use their local installation of wasm-pack.

One thing to also note is the following exception that throws Error: no prebuilt wasm-opt binaries are available for this platform: Unrecognized target!. However this can also be fixed by adding the following in the Cargo.toml:

[package.metadata.wasm-pack.profile.release]
wasm-opt = false

[package.metadata.wasm-pack.profile.dev]
wasm-opt = false

[Pauan]

I would rather provide an option to specify a custom path to wasm-pack, instead of trying to auto-detect things.

Also, note that optionalDependencies does not really make the dependency optional, it will still be installed regardless.

[human-bean-555]

I agree that would be better 😄 - I'll take a look at how to do it.

This is an easy fix in the wasm-pack package... however to get that updated is probably unlikely.

The reason for moving it to an optional dependency is that npm install will fail for all packages and not install anything on Apple silicon: the wasm-pack code runs a postinstall script that throws. Making it optional allows all the other packages to get installed.

[human-bean-555]

Ok.. so I've updated to add a wasmPackPath option.

I actually realized it that it will run ok so long as wasm-pack is installed globally... so if you wanted to keep it simple all that needs to be changed for it to work is the optionalDependancy?

[Pauan]

Looking a lot better, just a few minor things to fix.

[human-bean-555]

ok should be addressed.

[Pauan]

Thanks!