Merge pull request #33 from loic425/php81

Testing with PHP 8.1

Author: pamil

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                php: ["7.4", "8.0"]
+                php: ["7.4", "8.0", "8.1"]
                 symfony: ["^4.4", "^5.4", "6.0"]
                 exclude:
                     - php: "7.4"