Bump the phpstan group with 1 update

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

Updates `phpstan/phpstan` to 1.10.55
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/1.11.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.10.40...1.10.55)

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

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

composer.json

@@ -28,7 +28,7 @@
     "require-dev": {
         "nette/tester": "2.5.1",
         "mockery/mockery": "1.6.7",
-        "phpstan/phpstan": "1.10.40",
+        "phpstan/phpstan": "1.10.55",
         "phpstan/phpstan-strict-rules": "1.5.2",
         "phpstan/phpstan-nette": "1.2.9",
         "nepada/phpstan-nette-tester": "1.1.0",