Allow matthiasnoback/symfony-dependency-injection-test ^6.0.0 (#176)

* Update matthiasnoback/symfony-dependency-injection-test requirement from ^4 || ^5 to ^6.0.0

---
updated-dependencies:
- dependency-name: matthiasnoback/symfony-dependency-injection-test
  dependency-type: direct:development
...

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

* Allow SF DI test package v6.0

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Alessandro Lai <alessandro.lai85@gmail.com>

composer.json

@@ -25,7 +25,7 @@
         "symfony/framework-bundle": "^4.4 || ^5.0 || ^6.0 || ^7.0"
     },
     "require-dev": {
-        "matthiasnoback/symfony-dependency-injection-test": "^4 || ^5",
+        "matthiasnoback/symfony-dependency-injection-test": "^4 || ^5 || ^6",
         "symfony/web-profiler-bundle": "^4.4 || ^5.0 || ^6.0 || ^7.0",
         "symfony/console": "^4.4 || ^5.0 || ^6.0 || ^7.0",
         "phpunit/phpunit": "^9.6.13 || ^10.5.27",