Update ahash to fix compilation issue on nightly

[Kobzol]

The ahash crate has stopped compiling on nightly since today (tkaitchuck/aHash#200). This broke many crates, including this one, and in turn also a part of the Rust compiler benchmark suite, which uses this crate as one of its runtime benchmarks :)

A newer version of ahash (0.8.7) is needed to fix the compilation issue. This PR updates the ahash dependency to fix the compilation of this crate on nightly:

$ cargo +nightly build --no-default-features --features grid,nodejs

However, it still won't work with default features, since parcel_sourcemap would also need to be updated.

[kornelski]

grass_compiler has updated its ahash connorskees/grass#89

[kornelski]

@devongovett It'd be great to merge this. The grass_compiler dependency has upgraded ahash already.

[devongovett]

Looks like the bump has broken the wasm build due to getrandom not being available. I'll need to look into what changed in more detail.

[mischnic]

Here's how I did it for Parcel, I think I also had the exact same error there:

In node/Cargo.toml, add

[target.'cfg(target_arch = "wasm32")'.dependencies]
getrandom = { version = "0.2", features = ["custom"], default-features = false }

and then in the wasm/* JS wrappers:

  const {instance} = await WebAssembly.instantiateStreaming(fetch(input), {
    env: {
      ...napi,
      __getrandom_custom: (ptr, len) => {
        let buf = env.memory.subarray(ptr, ptr + len);
        crypto.getRandomValues(buf);
      },
    },
  });