Update libwabt.js

[dy]

Rebuild from latest source.

Steps taken:

0. Install deps

brew install binaryen cmake ninja

1. Install & enable emsdk

git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
./emsdk install latest
./emsdk activate latest
source ./emsdk_env.sh

(I could not figure out how to do that via brew)

2. Build via makefile

make emscripten-release
cp out/emscripten/Release/libwabt.js docs/demo

or just

make demo

[sbc100]

Can you mention in the description the precise steps you used to rebuild? I assume these are documented somewhere? I wonder if we should automate this?

[dy]

@sbc100 added steps taken. I didn't find the docs, I had to hold conversation/experimentation with copilot to find out a way.
I found new libwabt versions fail parsing certain (if) constructs from official testsuite, compared to the one currently in demo. So automation would make demo somewhat unstable, same time would help detecting if something broke.

[SoniEx2]

(there are no docs. we wonder how it was done last time?)

[dy]

@SoniEx2 just make demo. Providing you have all deps installed.