Run tests on PHP 8.3 (#13)

Author: dmason30

.github/workflows/run-tests.yml

@@ -13,7 +13,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest, macos-latest]
-        php: [8.2]
+        php: [8.2, 8.3]
         laravel: [10.*]
         stability: [prefer-lowest, prefer-stable]
         include: