Test under PHP 8.1

Author: nicolas-grekas

.github/workflows/phpunit.yml

@@ -18,6 +18,7 @@ jobs:
           - "7.3"
           - "7.4"
           - "8.0"
+          - "8.1"
         operating-system:
           - "ubuntu-latest"
 

composer.json

@@ -36,7 +36,7 @@
     },
     "require-dev": {
         "ext-phar":                     "*",
-        "symfony/phpunit-bridge":       "^5.2|^6.0"
+        "symfony/phpunit-bridge":       "^5.4|^6.0"
     },
     "autoload": {
         "psr-4": {