Update phpstan/phpstan-strict-rules requirement from ^0.12.1 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@0.12.1...1.2.3)

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

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

Author: dependabot[bot]

composer.json

@@ -30,7 +30,7 @@
     "squizlabs/php_codesniffer": "^3.4",
     "friendsofphp/php-cs-fixer": "^2.15",
     "brainmaestro/composer-git-hooks": "^2.8",
-    "phpstan/phpstan-strict-rules": "^0.12.1",
+    "phpstan/phpstan-strict-rules": "^1.2.3",
     "phpstan/extension-installer": "^1.0",
     "symfony/phpunit-bridge": "^5.1"
   },