[web] bump js-yaml in reference-parser (#33953)

* [web] bump `js-yaml` in `reference-parser`

`.yarn/patches/referer-parser-npm-0.0.3.patch` bumps the `js-yaml` dependency,
but yarn patches don't take that into account the patched package.json for dependency resolution.

* Add RequestHelper test

GitOrigin-RevId: 8246f8ab54956897cc361d7c02b65e5363ad43ec

package.json

@@ -35,6 +35,7 @@
     "@xmldom/xmldom": "0.8.13",
     "argparse/underscore": "1.13.8",
     "east/underscore": "1.13.8",
+    "referer-parser/js-yaml": "^4.1.0",
     "sandboxed-module": "patch:sandboxed-module@npm%3A2.0.4#~/.yarn/patches/sandboxed-module-npm-2.0.4-f8b45aacc9.patch",
     "request/tough-cookie": "5.1.2",
     "request/form-data": "2.5.5",