minor #98 Add PHP 8.1 to CI (derrabus)

This PR was merged into the 2.1-dev branch.

Discussion
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Add PHP 8.1 to CI

Commits
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b2bd334 Add PHP 8.1 to CI

Author: derrabus

Diff for: .github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                php: ['7.1.3', '7.2', '7.3', '7.4', '8.0']
+                php: ['7.1.3', '7.2', '7.3', '7.4', '8.0', '8.1']
                 include:
                     - php: '7.4'
                       deps: lowest

Diff for: composer.json

@@ -26,7 +26,7 @@
         "symfony/event-dispatcher": "^4.4 || ^5.0",
         "symfony/framework-bundle": "^4.4 || ^5.0",
         "symfony/http-kernel": "^4.4 || ^5.0",
-        "symfony/phpunit-bridge": "^4.4.19 || ^5.2",
+        "symfony/phpunit-bridge": "^5.4@dev",
         "nyholm/psr7": "^1.1",
         "psr/log": "^1.1 || ^2 || ^3"
     },