Update phpstan/phpstan requirement from ^0.12 to ^1.2

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/master/CHANGELOG.md)
- [Commits](phpstan/phpstan@0.12.0...1.2.0)

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

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

Author: dependabot[bot]

composer.json

@@ -32,7 +32,7 @@
     "symfony/security-bundle": "^4.1.9 || ^5",
     "symfony/yaml": "^4.1.9 || ^5",
     "phpunit/phpunit": "^9.5",
-    "phpstan/phpstan": "^0.12",
+    "phpstan/phpstan": "^1.2",
     "thecodingmachine/tdbm-fluid-schema-builder": "^1.0.0",
     "symfony/framework-bundle": "^5.2"
   },