This fixes an issue with hooking builtin modules that require the node: prefix (https://nodejs.org/api/all.html#all_modules_built-in-modules-with-mandatory-node-prefix), for example node:test.

• With IITM v2.0.0 and earlier this isn't possible.
• As of IITM v2.0.1 this is possible, but only accidentally because of the added specifier matching intended for sub-module imports.

Details

Given this can-i-hook-node-test.mjs

import { register } from 'node:module'
import { Hook } from './index.js'

register('./hook.mjs', import.meta.url)
Hook(['node:test'], (mod, name, baseDir) => {
  console.log(`IITM Hook: name=${name}`)
})

import('node:test')

With IITM 2.0.0 or earlier this doesn't work:

% node can-i-hook-node-test.mjs

With IITM 2.0.1 - 2.0.5, this "works", but the name value is wrong. The "working" is accidental: it is passing the moduleName === specifier test.

% node can-i-hook-node-test.mjs
IITM Hook: name=test

After this PR:

% node can-i-hook-node-test.mjs
IITM Hook: name=node:test