Fix for changing return types for PHP8.1 (#730)

Co-authored-by: Pim Jansen <pjansen@senet.nl>

src/Session/Handler.php

@@ -65,6 +65,7 @@ class Handler implements \SessionHandlerInterface
     /**
      * {@inheritdoc}
      */
+    #[\ReturnTypeWillChange]
     public function open($save_path, $session_id)
     {
         // NOOP
@@ -74,6 +75,7 @@ class Handler implements \SessionHandlerInterface
     /**
      * {@inheritdoc}
      */
+    #[\ReturnTypeWillChange]
     public function close()
     {
         // NOOP
@@ -83,6 +85,7 @@ class Handler implements \SessionHandlerInterface
     /**
      * {@inheritdoc}
      */
+    #[\ReturnTypeWillChange]
     public function gc($maxlifetime)
     {
         // NOOP
@@ -92,6 +95,7 @@ class Handler implements \SessionHandlerInterface
     /**
      * {@inheritdoc}
      */
+    #[\ReturnTypeWillChange]
     public function read($session_id)
     {
         if ($data = $this->client->get($session_id)) {
@@ -103,6 +107,7 @@ class Handler implements \SessionHandlerInterface
     /**
      * {@inheritdoc}
      */
+    #[\ReturnTypeWillChange]
     public function write($session_id, $session_data)
     {
         $this->client->setex($session_id, $this->ttl, $session_data);
@@ -113,6 +118,7 @@ class Handler implements \SessionHandlerInterface
     /**
      * {@inheritdoc}
      */
+    #[\ReturnTypeWillChange]
     public function destroy($session_id)
     {
         $this->client->del($session_id);