Test support of php 81

Ref #34480

Author: ChristopheTremblay

.github/workflows/tests.yml

@@ -9,12 +9,16 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [7.3, 7.4, 8.0]
+        php: [7.3, 7.4, 8.0, 8.1]
         laravel: [8.*]
         dependency-version: [prefer-lowest, prefer-stable]
         include:
           - laravel: 8.*
             testbench: 6.*
+        exclude:
+          - php: 8.1
+            laravel: 8.*
+            dependency-version: prefer-lowest
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.dependency-version }}