Relation to WebAssembly WebIDL Bindings proposal

[chicoxyzzy]

In the light of forthcoming updates in WebAssembly Host Bindings proposal it might make sense to choose WebIDL over JSIDL or at least mention Host Bindings WebIDL bindings as another advantage of choosing WebIDL in readme

[littledan]

I hope we can use WebIDL here, making JavaScript standard libraries using IDL capable of being accessed with the WebAssembly WebIDL bindings proposal.

[ExE-Boss]

Also, SpiderMonkey has already optimised calls between WebAssembly and built‑ins (alongside calls between JIT‑ed JS code and WASM)