Add php 8.3 to test pipeline (#23)

Author: marein

.github/workflows/main.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        php-version: ['7.4', '8.0', '8.1', '8.2']
+        php-version: ['7.4', '8.0', '8.1', '8.2', '8.3']
     name: ${{ matrix.php-version }}
     runs-on: ${{ matrix.operating-system }}
     steps: