Update phpstan/phpstan-strict-rules requirement from 1.1.0 to 1.2.3

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@1.1.0...1.2.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -27,7 +27,7 @@
     "require-dev": {
         "nette/tester": "2.4.2",
         "phpstan/phpstan": "1.6.3",
-        "phpstan/phpstan-strict-rules": "1.1.0",
+        "phpstan/phpstan-strict-rules": "1.2.3",
         "nepada/phpstan-nette-tester": "0.4.0",
         "spaze/phpstan-disallowed-calls": "2.3.2",
         "php-parallel-lint/php-parallel-lint": "1.3.2",