deps-dev(deps-dev): update phpstan/phpstan requirement || ^2.0

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/2.1.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.10.0...2.1.22)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.22
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -15,7 +15,7 @@
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "^3.7",
-        "phpstan/phpstan": "^1.10",
+        "phpstan/phpstan": "^1.10 || ^2.0",
         "google/protobuf": "^v4.32.0",
         "protobuf-php/protobuf-plugin": "^0.1.3",
         "symfony/polyfill-ctype": "^1.32.0"