test: Setup CI workflow to run tests on PHP 8.3

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [7.3, 7.4, 8.0, 8.1, 8.2]
+        php: [7.3, 7.4, 8.0, 8.1, 8.2, 8.3]
         laravel: [7.*, 8.*,  9.*, 10.*, 11.*]
         dependency-versions: [prefer-stable]
         include:
@@ -23,6 +23,13 @@ jobs:
           - laravel: 7.*
             testbench: 5.*
         exclude:
+          - php: 8.3
+            laravel: 7.*
+          - php: 8.3
+            laravel: 8.*
+          - php: 8.3
+            laravel: 9.*
+
           - php: 8.2
             laravel: 7.*
           - php: 8.2