Merge branch '9.6' into 10.5

* 9.6:
  Test with PHP 8.6

Author: sebastianbergmann

.github/workflows/ci.yaml

@@ -174,6 +174,7 @@ jobs:
           - "8.3"
           - "8.4"
           - "8.5"
+          - "8.6"
 
     steps:
       - name: Configure Git to avoid issues with line endings
@@ -247,6 +248,7 @@ jobs:
           - "8.3"
           - "8.4"
           - "8.5"
+          - "8.6"
 
     steps:
       - name: Configure Git to avoid issues with line endings
@@ -440,6 +442,7 @@ jobs:
           - "8.3"
           - "8.4"
           - "8.5"
+          - "8.6"
 
         coverage:
           - pcov