ci: run tests on PHP 8.1 and 8.3

Author: smichaelsen

.github/workflows/ci.yml

@@ -5,6 +5,9 @@ on: [pull_request]
 jobs:
   phpstan:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-version: [ '8.1', '8.3' ]
     steps:
       - uses: actions/checkout@v3
       - uses: php-actions/composer@v6
@@ -16,6 +19,9 @@ jobs:
 
   php-cs-fixer:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-version: [ '8.1', '8.3' ]
     steps:
       - uses: actions/checkout@v3
       - uses: php-actions/composer@v6
@@ -27,6 +33,9 @@ jobs:
 
   rector:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-version: [ '8.1', '8.3' ]
     steps:
       - uses: actions/checkout@v3
       - uses: php-actions/composer@v6