Update phpstan/phpstan-strict-rules requirement from 1.6.0 to 1.6.1

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@1.6.0...1.6.1)

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

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

composer.json

@@ -48,7 +48,7 @@
         "phpstan/extension-installer": "1.4.3",
         "phpstan/phpstan": "1.12.4",
         "phpstan/phpstan-phpunit": "1.4.0",
-        "phpstan/phpstan-strict-rules": "1.6.0",
+        "phpstan/phpstan-strict-rules": "1.6.1",
         "phpunit/phpunit": "9.6.21",
         "rawr/cross-data-providers": "2.4.0"
     },