Provide aarch64 linux natives

```
/usr/local/lib/node_modules/wasm4/assets/natives/wasm4-linux: 1: Syntax error: word unexpected (expecting ")")
```

The prebuilt wasm4 linux binary is meant for x86_64 systems. I'm not sure how to tell npm to build it from source. 

Additionally, it seems that pkg was deprecated 👀 See https://nodejs.org/api/single-executable-applications.html