Update phpstan/phpstan-strict-rules requirement from 1.6.0 to 1.6.1 (#35)

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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -26,7 +26,7 @@
 		"nette/tester": "~2.0",
 		"phpstan/phpstan": "1.12.7",
 		"phpstan/extension-installer": "1.4.3",
-		"phpstan/phpstan-strict-rules": "1.6.0"
+		"phpstan/phpstan-strict-rules": "1.6.1"
 	},
 	"autoload": {
 		"psr-4": {