Merge branch '9.next' into 11.next-cake4

Author: skie

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: ['7.3', '7.4', '8.0']
+        php-version: ['7.3', '7.4', '8.0', '8.1']
         db-type: [sqlite, mysql, pgsql]
         prefer-lowest: ['']