support for PHP 8.3

Author: dg

.github/workflows/tests.yml

@@ -7,7 +7,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+                php: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
 
             fail-fast: false