Test against php 8.3 (thephpleague#694)

Author: sergiy-petrov

.github/workflows/run-tests.yml

@@ -19,7 +19,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [8.2, 8.1, 8.0, 7.4, 7.3]
+        php: [8.3, 8.2, 8.1, 8.0, 7.4, 7.3]
         dependency-version: [prefer-lowest, prefer-stable]
 
     name: P${{ matrix.php }} - ${{ matrix.dependency-version }}