Add support for Symfony 6 (#13)

Author: chris-doehring

.github/workflows/phpunit-symfony6.yml

@@ -39,8 +39,9 @@ jobs:
         run: vendor/bin/phpunit -v --coverage-text --coverage-clover build/logs/clover.xml
 
       - name: Upload coverage results to Coveralls
+        if: ${{ matrix.dependency-version == 'prefer-lowest' }}
         env:
           COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          composer global require php-coveralls/php-coveralls
+          composer global require php-coveralls/php-coveralls guzzlehttp/guzzle:^7.0 --prefer-lowest
           php-coveralls --coverage_clover=build/logs/clover.xml -v

.github/workflows/phpunit.yml

@@ -12,7 +12,7 @@
     "php": "^8.0",
     "ext-json": "*",
     "dogado/json-api-common": "^3.0",
-    "symfony/validator": "^5.3.7"
+    "symfony/validator": "^5.3.7|^6.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^9.5",