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


gulp
          .src(LIB_DIR + "**/*", { base: LIB_DIR })
          .pipe(gulp.dest(DIST_DIR + "lib/")),
        gulp
          .src(TYPES_DIR + "**/*", { base: TYPES_DIR })
          .pipe(gulp.dest(DIST_DIR + "types/")),
      ]);
    }
  )
);
gulp.task(
  "dist-install",
  gulp.series("dist-pre", function createDistInstall(done) {
    let distPath = DIST_DIR;
    const opts = {};
    const installPath = process.env.PDFJS_INSTALL_PATH;
    if (installPath) {
      opts.cwd = installPath;
      distPath = path.relative(installPath, distPath);
    }
    safeSpawnSync("npm", ["install", distPath], opts);
    done();
  })
);
gulp.task(
  "dist",
  gulp.series("dist-pre", function createDist(done) {
    const VERSION = getVersionJSON().version;
    console.log();
    console.log("### Committing changes");