[TASK] Update phpstan/phpstan-strict-rules requirement

Updates the requirements on [phpstan/phpstan-strict-rules](https://github.com/phpstan/phpstan-strict-rules) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan-strict-rules/releases)
- [Commits](phpstan/phpstan-strict-rules@1.5.3...1.5.5)

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

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

composer.json

@@ -24,7 +24,7 @@
         "phpstan/phpstan": "^1.10.67",
         "phpstan/phpstan-deprecation-rules": "^1.1",
         "phpstan/phpstan-phpunit": "^1.3.16",
-        "phpstan/phpstan-strict-rules": "^1.5.3",
+        "phpstan/phpstan-strict-rules": "^1.5.5",
         "phpunit/phpunit": "^10.5.19",
         "rector/rector": "^1.0.4",
         "spaze/phpstan-disallowed-calls": "^3.1",