[PHP]: Update phpstan/phpstan requirement from 1.12.6 to 1.12.7

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/2.0.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.12.6...1.12.7)

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

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -27,7 +27,7 @@
         "dg/bypass-finals": "^1.1",
         "doctrine/dbal": "^2.5 | ^3.0",
         "doctrine/orm": "^2.5",
-        "phpstan/phpstan": "1.12.6",
+        "phpstan/phpstan": "1.12.7",
         "phpstan/phpstan-phpunit": "1.4.0",
         "rector/rector": "1.2.8",
         "roave/security-advisories": "dev-master",