Issue with ESM "exports" at runtime

[edouardmercier]

When using Caporal v3.15.0 under macOS, within an ESM application (written in TypeScript), at runtime the module throws the following exception:

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '<path>/electron/node_modules/lodash/kebabCase' imported from <path>/node_modules/@caporal/core/dist/index.mjs

It seems that this is due to the faulty exports JSON root element in the package.json module, which as the value

  ".": {
      "types": "./dist/index.d.ts",
      "require": "./dist/index.js",
      "import": "./dist/index.mjs"
    }

and which seems to cause the resolver to fail. When removing that exports JSON element, the runtime is fine. I'm not very familiar with the syntax of the Node.js import and exports JSON properties, see https://nodejs.org/api/packages.html#subpath-exports, hence I was not able to figure exactly why the removal of the exports element solves the issue.