Run tests on PHP 8.1

Author: malberts

.github/workflows/ci.yml

@@ -16,14 +16,17 @@ jobs:
       matrix:
         include:
           - mw: 'REL1_43'
-            php: 8.3
+            php: 8.1
             experimental: false
           - mw: 'REL1_44'
-            php: 8.4
+            php: 8.2
             experimental: false
           - mw: 'REL1_45'
-            php: 8.4
+            php: 8.3
             experimental: false
+          - mw: 'master'
+            php: 8.4
+            experimental: true
           - mw: 'master'
             php: 8.5
             experimental: true