ESM compatibility

[FND]

recent versions of Node (since v13?) refuse to load faucet.config.js for ESM projects, i.e. such with "type": "module" in package.json:

Warning: require() of ES modules is not supported.
require() of …/faucet.config.js from …/node_modules/faucet-pipeline-core/lib/config.js is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
Instead rename faucet.config.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from package.json.

renaming the config file (i.e. faucet -c faucet.config.cjs) is a viable workaround, but not very satisfying

[moonglum]

As discussed, let's compare that with the approach taken by tools like ESLint, Babel, Rollup, Mocha etc.

It might also be an option to go with something like .faucetrc (cf. 3777779), though it appears that's no longer en vogue.