[PHP]: Update phan/phan requirement in /vendor-bin/phan

Updates the requirements on [phan/phan](https://github.com/phan/phan) to permit the latest version.
- [Release notes](https://github.com/phan/phan/releases)
- [Changelog](https://github.com/phan/phan/blob/v5/NEWS.md)
- [Commits](phan/phan@5.4.2...5.4.3)

---
updated-dependencies:
- dependency-name: phan/phan
  dependency-type: direct:development
...

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

vendor-bin/phan/composer.json

@@ -1,6 +1,6 @@
 {
     "require-dev": {
-        "phan/phan": "5.4.2",
+        "phan/phan": "5.4.3",
         "drenso/phan-extensions": "3.5.1"
     }
 }