wasm-pack limits our ability to configure wasm-bindgen and is no
longer necessary as we can use wasm-bindgen-cli directly. This
allows us to enable --weakrefs which partially mitigates #786 by
using a FinalizationRegistry (currently working in Deno Canary,
though not yet on Stable) to free memory in the WASM heap
automatically when the corresponding JavaScript wrapper objects
are garbage-collected.
Co-authored-by: William Perron <hey@wperron.io>
