Bump phpstan/phpstan from 1.12.9 to 2.0.1

Bumps [phpstan/phpstan](https://github.com/phpstan/phpstan) from 1.12.9 to 2.0.1.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/2.0.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.12.9...2.0.1)

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

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

composer.json

@@ -21,7 +21,7 @@
         }
     },
     "require-dev": {
-        "phpstan/phpstan": "^1",
+        "phpstan/phpstan": "^2",
         "squizlabs/php_codesniffer": "^3.7"
     },
     "config": {