Merge branch '11.5' into 12.3

* 11.5:
  Test with PHP 8.6

Author: sebastianbergmann

.github/workflows/ci.yaml

@@ -168,6 +168,7 @@ jobs:
           - "8.3"
           - "8.4"
           - "8.5"
+          - "8.6"
 
     steps:
       - name: Configure Git to avoid issues with line endings
@@ -239,6 +240,7 @@ jobs:
           - "8.3"
           - "8.4"
           - "8.5"
+          - "8.6"
 
     steps:
       - name: Configure Git to avoid issues with line endings
@@ -430,6 +432,7 @@ jobs:
           - "8.3"
           - "8.4"
           - "8.5"
+          - "8.6"
 
         coverage:
           - pcov