ci: 👷 drop MW 1.41 and add MW 1.43 test

.github/workflows/php-tests.yml

@@ -6,23 +6,12 @@ on:
 jobs:
   test:
     name: "PHP tests: MW ${{ matrix.mw }}, PHP ${{ matrix.php }}"
-    continue-on-error: ${{ matrix.experimental }}
 
     strategy:
       matrix:
         include:
-          - mw: 'REL1_39'
+          - mw: [ 'REL1_39', 'REL1_42', 'REL1_43' ]
             php: 8.1
-            experimental: false
-          - mw: 'REL1_41'
-            php: 8.1
-            experimental: true
-          - mw: 'REL1_42'
-            php: 8.1
-            experimental: true
-          #- mw: 'master'
-          #  php: 8.1
-          #  experimental: true
 
     runs-on: ubuntu-latest