[PHP]: Update phpstan/phpstan-doctrine requirement from 1.5.4 to 1.5.5

Updates the requirements on [phpstan/phpstan-doctrine](https://github.com/phpstan/phpstan-doctrine) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan-doctrine/releases)
- [Commits](phpstan/phpstan-doctrine@1.5.4...1.5.5)

---
updated-dependencies:
- dependency-name: phpstan/phpstan-doctrine
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -33,7 +33,7 @@
         "ext-ast": "*",
         "bamarni/composer-bin-plugin": "^1.4",
         "phpstan/phpstan": "1.12.7",
-        "phpstan/phpstan-doctrine": "1.5.4",
+        "phpstan/phpstan-doctrine": "1.5.5",
         "phpstan/phpstan-phpunit": "1.4.0",
         "phpstan/phpstan-symfony": "1.4.10",
         "rector/rector": "1.2.8",