chore(deps-dev): bump fast-xml-parser

Bumps [fast-xml-parser](https://github.com/NaturalIntelligence/fast-xml-parser) from 4.5.0 to 5.5.7.
- [Release notes](https://github.com/NaturalIntelligence/fast-xml-parser/releases)
- [Changelog](https://github.com/NaturalIntelligence/fast-xml-parser/blob/master/CHANGELOG.md)
- [Commits](NaturalIntelligence/fast-xml-parser@v4.5.0...v5.5.7)

---
updated-dependencies:
- dependency-name: fast-xml-parser
  dependency-version: 5.5.7
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/Playwright.TestingHarnessTest/package-lock.json

@@ -4,6 +4,6 @@
   "devDependencies": {
     "@playwright/test": "1.59.0-alpha-2026-03-24",
     "@types/node": "^22.12.0",
-    "fast-xml-parser": "^4.5.0"
+    "fast-xml-parser": "^5.5.7"
   }
 }