feat: use PHP 8.1 as default and add this version in workflow

Author: delyriand

.github/workflows/recipe.yaml

@@ -17,9 +17,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['7.4' ,'8.0']
+        php: ['7.4' ,'8.0', '8.1']
         sylius: ["~1.9.0", "~1.10.0", "~1.11.0", "~1.12.0"]
         exclude:
+          - php: 8.1
+            sylius: "~1.9.0"
           - php: 8.0
             sylius: "~1.9.0"
           - php: 7.4

.github/workflows/security.yaml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['7.4', '8.0']
+        php: ['7.4', '8.0', '8.1']
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/tests.yaml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['8.0']
+        php: ['8.0', '8.1']
 
     env:
       SYMFONY_ARGS: --no-tls

.php-version.dist

@@ -1 +1 @@
-8.0
+8.1