Bump phpstan/phpstan from 1.12.3 to 2.0.3

Bumps [phpstan/phpstan](https://github.com/phpstan/phpstan) from 1.12.3 to 2.0.3.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/2.0.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.12.3...2.0.3)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

composer.json

@@ -5,7 +5,7 @@
   "require": {
     "php": "^8.1",
     "nette/utils": "^3.0 || ^4.0",
-    "phpstan/phpstan": "^1.9"
+    "phpstan/phpstan": "^2.0"
   },
   "autoload": {
     "psr-4": {