locale load can't be bundled anymore about edtf.js

[inukshuk]

Switched to import assertions in 4.3.0

[retorquere]

esbuild has so far been able to compile everything I could throw at it (with the addition of some plugins).

[inukshuk]

What prompted the change was actually that you were confused by the mixed use of CommonJS and ES modules -- we used CJS to load the locale data as a convenience because ES modules didn't support loading JSON. It looks like import assertions now work in Node.js v16 so I think we could switch to those instead.

[inukshuk]

It turns out the support in Rollup isn't great; there's a plugin, but there are complications if you (or a dependency) also requires JSON files. I'll revert back to using CommonJS for the locale data until Rollup has built-in support for import assertions.

[retorquere]

This esbuild file compiles the import assertions without further plugins, and tests seem to pass:

import esbuild from 'esbuild'

esbuild.buildSync({
  entryPoints: ['index.js'],
  bundle: true,
  sourcemap: true,
  outfile: 'dist/index.cjs',
  external: [
    'assert',
    'fs',
    'nearley',
    'randexp'
  ],
  format: 'cjs',
})