test more PHP versions in CI

.github/workflows/ci.yml

@@ -16,10 +16,20 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        laravel: [10]
+        include:
+          - laravel: 10
+            php: 8.1
+          - laravel: 10
+            php: 8.2
+          - laravel: 10
+            php: 8.3
 
     steps:
     - uses: actions/checkout@v2
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{matrix.php}}
     - name: Install composer dependencies
       run: composer require "illuminate/support:^${{ matrix.laravel }}.0"
     - name: Run tests