Recently we upgraded to Gulp 4. However, the following things still need to be addressed in some way:

- If a task series is executed with an anonymous function inside it, we'll see `Starting '<anonymous>'` in the output, which isn't that great. We need to either suppress it or use named functions.
- If a task is private, it should be hidden in some way. For example, `gh-pages-prepare` is only used in the public `web` target and should not be used on its own, however currently it shows in the default `gulp` output since it's a regular task. Perhaps we should mark them with an underscore?
console.log("Website built in " + GH_PAGES_DIR);
  done();
});
gulp.task(
  "web",
  gulp.series(
    "generic",
    "generic-legacy",
    "jsdoc",
    "gh-pages-prepare",
    "wintersmith",
    "gh-pages-git"
  )
);
function packageBowerJson() {
  const VERSION = getVersionJSON().version;
  const DIST_NAME = "pdfjs-dist";
  const DIST_DESCRIPTION = "Generic build of Mozilla's PDF.js library.";
  const DIST_KEYWORDS = ["Mozilla", "pdf", "pdf.js"];
  const DIST_HOMEPAGE = "http://mozilla.github.io/pdf.js/";
  const DIST_BUGS_URL = "https://github.com/mozilla/pdf.js/issues";
  const DIST_LICENSE = "Apache-2.0";
  const npmManifest = {
    name: DIST_NAME,
    version: VERSION,
    main: "build/pdf.js",
    types: "types/pdf.d.ts",
    description: DIST_DESCRIPTION,
    keywords: DIST_KEYWORDS,
    homepage: DIST_HOMEPAGE,