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


],
      { base: "src/" }
    ),
    gulp.src(
      ["examples/node/domstubs.js", "web/*.js", "!web/{pdfjs,viewer}.js"],
      { base: "." }
    ),
    gulp.src("test/unit/*.js", { base: "." }),
  ]);
  return buildLibHelper(bundleDefines, inputStream, dir);
}
gulp.task(
  "lib",
  gulp.series(
    createBuildNumber,
    function scriptingLib() {
      const defines = builder.merge(DEFINES, { GENERIC: true, LIB: true });
      return merge([
        buildDefaultPreferences(defines, "lib/"),
        createTemporaryScriptingBundle(defines),
      ]);
    },
    function createLib() {
      const defines = builder.merge(DEFINES, { GENERIC: true, LIB: true });
      return merge([
        buildLib(defines, "build/lib/"),
        createSandboxBundle(defines).pipe(gulp.dest("build/lib/")),
      ]);
    }
  )