Add PHP8.1 ReturnTypeWillChange attribute to support test classes (#39842)

Co-Authored-By: Jake Bathman <[email protected]>
Co-Authored-By: Jamison Valenta <[email protected]>

Co-authored-by: Jake Bathman <[email protected]>
Co-authored-by: Jamison Valenta <[email protected]>

Author: 3 people

tests/Support/SupportCollectionTest.php

@@ -4970,21 +4970,25 @@ public function __construct($arr)
         $this->arr = $arr;
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetExists($offset)
     {
         return isset($this->arr[$offset]);
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         return $this->arr[$offset];
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetSet($offset, $value)
     {
         $this->arr[$offset] = $value;
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetUnset($offset)
     {
         unset($this->arr[$offset]);