In Webpack 5, the [recommended way](https://webpack.js.org/guides/web-workers/) to create a web worker is

```ts
new Worker(new URL('./worker.js', import.meta.url));
```

Could we update\* the [`pdfjs-dist/webpack` entrypoint](https://github.com/mozilla/pdfjs-dist/blob/master/webpack.js) to use this syntax instead of the legacy `worker-loader`? One of the Webpack contributors told me that `worker-loader` uses "magic" and can cause issues.

\* To maintain compatibility with people still using Webpack 4, we should probably introduce a new entrypoint called `pdfjs-dist/webpack5` (or something like that) rather than changing the existing entrypoint.

Can attempt a PR if you would like.

Closely-related: https://github.com/mozilla/pdf.js/issues/15302


return gulp
    .src(dir + "**")
    .pipe(zip(targetName))
    .pipe(gulp.dest(BUILD_DIR))
    .on("end", function () {
      console.log("Built distribution file: " + targetName);
    });
}
gulp.task(
  "publish",
  gulp.series("generic", "generic-legacy", function createPublish(done) {
    const version = JSON.parse(
      fs.readFileSync(BUILD_DIR + "version.json").toString()
    ).version;
    config.stableVersion = version;
    return merge([
      createStringSource(CONFIG_FILE, JSON.stringify(config, null, 2)).pipe(
        gulp.dest(".")
      ),
      compressPublish("pdfjs-" + version + "-dist.zip", GENERIC_DIR),
      compressPublish(
        "pdfjs-" + version + "-legacy-dist.zip",
        GENERIC_LEGACY_DIR
      ),
    ]);
  })
);
function setTestEnv(done) {