Add #[ReturnTypeWillChange] for PHP 8.1 support (#261)

Author: alexpott

src/main/php/org/bovigo/vfs/DotDirectory.php

@@ -18,6 +18,7 @@ class DotDirectory extends vfsStreamDirectory
      *
      * @return  vfsStreamContainerIterator
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         return new \ArrayIterator(array());

src/main/php/org/bovigo/vfs/vfsStreamContainerIterator.php

@@ -38,6 +38,7 @@ public function __construct(array $children)
     /**
      * resets children pointer
      */
+    #[\ReturnTypeWillChange]
     public function rewind()
     {
         reset($this->children);
@@ -48,6 +49,7 @@ public function rewind()
      *
      * @return  vfsStreamContent
      */
+    #[\ReturnTypeWillChange]
     public function current()
     {
         $child = current($this->children);
@@ -63,6 +65,7 @@ public function current()
      *
      * @return  string
      */
+    #[\ReturnTypeWillChange]
     public function key()
     {
         $child = current($this->children);
@@ -76,6 +79,7 @@ public function key()
     /**
      * iterates to next child
      */
+    #[\ReturnTypeWillChange]
     public function next()
     {
         next($this->children);
@@ -86,6 +90,7 @@ public function next()
      *
      * @return  bool
      */
+    #[\ReturnTypeWillChange]
     public function valid()
     {
         return (false !== current($this->children));

src/main/php/org/bovigo/vfs/vfsStreamDirectory.php

@@ -245,6 +245,7 @@ public function getChildren()
      *
      * @return  vfsStreamContainerIterator
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         return new vfsStreamContainerIterator($this->children);