asar-node does not work with package.json exports field

[RhodeHummel]

When trying to import a module defined in a package.json exports field asar-node fails to find the module.

Example:

// throws Error: Cannot find module '@my-package/server-code'
const serverCode = require('@my-package/server-code');

package.json

{
   "main": "dist/default.js",
   "exports": {
      ".": "./dist/default.js",
      "./server-code": "./dist/server-code.js"
   }
}

See: https://nodejs.org/api/modules.html#all-together

[toyobayashi]

I will look into how to implement it when I get some time.

asar-node/lib/module.js

Lines 221 to 224 in 571dcad

	// if (!absoluteRequest) {
	// const exportsResolved = resolveExports(curPath, request)
	// if (exportsResolved) { return exportsResolved }
	// }

[toyobayashi]

I'm sorry to say, it seems so complicated (out of my ability now) to reimplement Node.js official resolution algorithm in asar-node. PR that add basic support to this feature is welcome.