bug: zerokit-rln-wasm fails to run in browser

[adklempner]

using the published version from npm:
@waku/zerokit-rln-wasm: 0.3.0

calling __wbg_init fails with:

LinkError: WebAssembly.instantiate(): Import #5 "wbg" "__wbg_log_8cec76766b8c0e33": function import requires a callable

Seems related to drager/wasm-pack#1446

Note that when I build rln-wasm locally from master, and link the resulting pkg, I don't get the error. However, I'm using an older version of wasm-pack:

[WARN]: ⚠️   There's a newer version of wasm-pack available, the new version is: 0.13.1, you are using: 0.12.1. To update, navigate to: https://rustwasm.github.io/wasm-pack/installer/