update dependencies and test on 8.3 at github

Author: splitbrain

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
 
     strategy:
       matrix:
-        php-versions: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+        php-versions: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
       fail-fast: false
 
     steps: