Add PHP 8.1 compatibility to Config

Author: alexander-schranz

src/PHPCR/Shell/Config/Config.php

@@ -24,6 +24,7 @@ public function __construct($data)
         $this->data = $data;
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetSet($offset, $value)
     {
         throw new \InvalidArgumentException(sprintf(
@@ -32,16 +33,19 @@ public function offsetSet($offset, $value)
         ));
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetExists($offset)
     {
         return isset($this->data[$offset]);
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetUnset($offset)
     {
         unset($this->data[$offset]);
     }
 
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         if (isset($this->data[$offset])) {
@@ -55,26 +59,31 @@ public function offsetGet($offset)
         }
     }
 
+    #[\ReturnTypeWillChange]
     public function current()
     {
         return current($this->data);
     }
 
+    #[\ReturnTypeWillChange]
     public function key()
     {
         return key($this->data);
     }
 
+    #[\ReturnTypeWillChange]
     public function next()
     {
         return next($this->data);
     }
 
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         return reset($this->data);
     }
 
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return current($this->data);