composer(deps-dev): bump phpstan/phpstan-strict-rules

Bumps [phpstan/phpstan-strict-rules](https://github.com/phpstan/phpstan-strict-rules) from 1.5.5 to 1.6.0.
- [Release notes](https://github.com/phpstan/phpstan-strict-rules/releases)
- [Commits](phpstan/phpstan-strict-rules@1.5.5...1.6.0)

---
updated-dependencies:
- dependency-name: phpstan/phpstan-strict-rules
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

composer.json

@@ -59,7 +59,7 @@
         "phpbench/phpbench": "^1.2",
         "phpstan/extension-installer": "^1.3",
         "phpstan/phpstan": "^1.11",
-        "phpstan/phpstan-strict-rules": "^1.5",
+        "phpstan/phpstan-strict-rules": "^1.6",
         "phpstan/phpstan-webmozart-assert": "^1.2",
         "phpunit/phpunit": "^10.5",
         "psalm/plugin-phpunit": "^0.19.0",