Replace deprecated terser plugin

[surma]

rollup-plugin-terser has been long deprecated and replaced by @rollup/plugin-terser.

I discovered this during some Wasm work, where Emscripten now emits code using ??= which the older terser does not understand. The switch to @rollup/plugin-terser fixes that.

There are lots of outdated dependencies, but rather than do a massive PR I figured I’d do it one step at a time.

[surma]

... Turns out we were also still on Node 14 in .nvmrc, which doesn’t have someArray.at(), which the terser plugin relies on.

So this PR also updates to Node 20 LTS.

[surma]

No idea why Windows is failing or what I need to do to fix it 😕

[aryanpingle]

Judging purely from the error report, this could be the issue? It's a breaking change in node for Windows users

[surma]

@aryanpingle Great find! That seems to have resolved that issue, however now there’s a new path issue 🙄

I’ll see if I can spin up a Windows workstation somewhere...

[aryanpingle]

@surma GH actions runs npm run build, not npm run dev - so it hasn't caught the fact that you can't set env vars like DEV_PORT=\"${DEV_PORT:=5000}\" on Windows. Can we go back to the hardcoded --listen=5000?

In the future if we need to use the port number elsewhere we can just declare it separately

[jakearchibald]

Thank you!