Node warning 1335254 using node v20.12.0

[aspeddro]

./cli/rescript.js build --help command print node warning 1335254

(node:1335254) ExperimentalWarning: Importing JSON modules is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
Usage: rescript build <options> -- <ninja_options>

`rescript build` builds the project with dependencies

`rescript build -- -h` for Ninja options (internal usage only; unstable)

Options:
  -w           Watch mode
  -ws          [host]:port set up host & port for WebSocket build notifications
  -verbose     Set the output to be verbose
  -with-deps   *deprecated* This is the default behavior now. This option will be removed in a future release
  -warn-error  Warning numbers and whether to turn them into errors, e.g., "+8+32-102"

Node v20.19.0 (version used on CI) don't print this warning

[aspeddro]

We should update engines.node in package.json?

[cometkim]

It won't cause any real problems as it has been stabilized since then without any changes.

[cometkim]

it has been stabilized since then without any changes.

It is v23.1.0 according to the docs https://nodejs.org/api/esm.html#json-modules

But I couldn't find its back-porting history

[cometkim]

We can change it to use node:fs api to avoid the warning anyway.