Bump the phpstan group with 2 updates

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) and [phpstan/phpstan-strict-rules](https://github.com/phpstan/phpstan-strict-rules) to permit the latest version.

Updates `phpstan/phpstan` to 1.12.5
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/2.0.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.12.0...1.12.5)

Updates `phpstan/phpstan-strict-rules` to 1.6.1
- [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
  dependency-type: direct:development
  dependency-group: phpstan
- dependency-name: phpstan/phpstan-strict-rules
  dependency-type: direct:development
  dependency-group: phpstan
...

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

composer.json

@@ -20,8 +20,8 @@
     },
     "require-dev": {
         "nette/tester": "2.5.3",
-        "phpstan/phpstan": "1.12.0",
-        "phpstan/phpstan-strict-rules": "1.6.0",
+        "phpstan/phpstan": "1.12.5",
+        "phpstan/phpstan-strict-rules": "1.6.1",
         "phpstan/phpstan-nette": "1.3.8",
         "nepada/phpstan-nette-tester": "1.2.0",
         "spaze/phpstan-disallowed-calls": "3.4.0",