fix PHP 8.1 limit

src/ActionsCleanersStack.php

@@ -32,7 +32,10 @@ class ActionsCleanersStack implements Countable, Iterator
         return isset($this->stack[$offset]);
     }
 
-    public function get(int $offset): ?ActionDescriptor
+    /**
+     * @return null|ActionDescriptor
+     */
+    public function get(int $offset)
     {
         return $this->stack[$offset] ?? null;
     }
@@ -52,12 +55,20 @@ class ActionsCleanersStack implements Countable, Iterator
         reset($this->stack);
     }
 
-    public function current(): false|ActionDescriptor
+    /**
+     * @return false|ActionDescriptor
+     */
+    #[\ReturnTypeWillChange]
+    public function current()
     {
         return current($this->stack);
     }
 
-    public function key(): ?int
+    /**
+     * @return null|int
+     */
+    #[\ReturnTypeWillChange]
+    public function key()
     {
         return key($this->stack);
     }

src/ActionsStack.php

@@ -56,12 +56,20 @@ class ActionsStack implements Countable, Iterator
         reset($this->stack);
     }
 
-    public function current(): false|ActionsCleanersStack
+    /**
+     * @return false|ActionsCleanersStack
+     */
+    #[\ReturnTypeWillChange]
+    public function current()
     {
         return current($this->stack);
     }
 
-    public function key(): ?string
+    /**
+     * return null|string
+     */
+    #[\ReturnTypeWillChange]
+    public function key()
     {
         return key($this->stack);
     }

src/CleanerParent.php

@@ -50,7 +50,7 @@ abstract class CleanerParent
      *
      * @return  null|ActionDescriptor   The action descriptor
      */
-    final public function get(string $id): ?ActionDescriptor
+    final public function get(string $id)
     {
         return $this->actions[$id] ?? null;
     }

src/CleanersStack.php

@@ -43,7 +43,10 @@ class CleanersStack implements Countable, Iterator
         return isset($this->stack[$offset]);
     }
 
-    public function get(string $offset): ?CleanerParent
+    /**
+     * @return null|CleanerParent
+     */
+    public function get(string $offset)
     {
         return $this->stack[$offset] ?? null;
     }
@@ -67,12 +70,20 @@ class CleanersStack implements Countable, Iterator
         reset($this->stack);
     }
 
-    public function current(): false|CleanerParent
+     /**
+      * @return false|CleanerParent
+      */
+     #[\ReturnTypeWillChange]
+    public function current()
     {
         return current($this->stack);
     }
 
-    public function key(): ?string
+    /**
+     * @return null|string
+     */
+    #[\ReturnTypeWillChange]
+    public function key()
     {
         return key($this->stack);
     }

src/Helper/DirTrait.php

@@ -25,7 +25,7 @@ trait DirTrait
     /**
      * Get excuded files.
      *
-     * @param   array<int,string>   The excluded files
+     * @return  array<int,string>   The excluded files
      */
     public static function getExcluded(): array
     {

src/Uninstaller.php

@@ -264,7 +264,7 @@ class Uninstaller
      *
      * @return  null|ActionDescriptor   The action description
      */
-    private function addAction(string $cleaner, string $action, string $ns, ?bool $default): ?ActionDescriptor
+    private function addAction(string $cleaner, string $action, string $ns, ?bool $default)
     {
         // no current module or no cleaner id or no ns or unknown cleaner action
         if (null === $this->module