[flatbuffers] Fix CI in node 20

[ibc]

Same as versatica/mediasoup-client#283

[ibc]

Next in a new PR I'm gonna remove mediasoup.version getter. It's a complete hack (in involves fs.writeFileSync() in JS transpiled files in node/lib folder). I know this is a breaking change since mediasoup.version is a public getter but I think we can live with it. @nazar-pc @jmillan thoughts?

[ibc]

So @nazar-pc suggest making mediasoup.version getter run fs.readfileSync(path.join(__dirname__, '..', 'package.json') and parse it and return the value of version field. It's an overkill IMHO.

[nazar-pc]

It is not a getter, it is a constant, so you'll need to do that in (() => {})() so it is called immediately.

This is a public API you've committed to, breaking it isn't nice. I'm not sure why people would use that field, but maybe a bit less bad alternative than removing it would be to fix it at soem value like current release and mark as deprecated for people to not rely on anymore.

[ibc]

I'll check keep it as it is. The issue is fixed in this PR so I won't complicate my life more than it is already. In v4 this will be removed.