feat: allow symfony 8 (dev-requirement) (#1264)

* feat: allow symfony 8 (dev-requirement)

* Update src/Common/composer.json

Co-authored-by: Jonathan Beliën <jbelien@users.noreply.github.com>

* Update src/Http/composer.json

Co-authored-by: Jonathan Beliën <jbelien@users.noreply.github.com>

---------

Co-authored-by: Christopher Georg <christopher.georg@sr-travel.de>
Co-authored-by: Jonathan Beliën <jbelien@users.noreply.github.com>

Author: 3 people

composer.json

@@ -25,7 +25,7 @@
         "php-http/message": "^1.0",
         "php-http/mock-client": "^1.0",
         "phpunit/phpunit": "^9.6.11",
-        "symfony/stopwatch": "~2.5 || ~5.0"
+        "symfony/stopwatch": "~2.5 || ~5.0 || ~6.0 || ~7.0 || ~8.0"
     },
     "extra": {
         "branch-alias": {