Can't add intrinsics to AsyncRuntime

[chyyran]

pub(crate) struct CustomIntrinsic;

impl Intrinsic for CustomIntrinsic {
    unsafe fn add_intrinsic(ctx: NonNull<rquickjs::qjs::JSContext>) {
        let this = unsafe {
            Ctx::from_raw(ctx)
        };
        this.globals();
    }
}

...

// this panics with `tried to cource js value Int(0) to the wrong type, this is a rquickjs bug`
let context = AsyncContext::custom::<CustomIntrinsic>(&runtime).await?;