Fix PHP 8.1 tentative return types (#2)

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Co-authored-by: Kieran <kieran.brahney@gmail.com>

Author: ChristophWurst

lib/Horde/Stream/Filter/Bin2hex.php

@@ -22,6 +22,7 @@ class Horde_Stream_Filter_Bin2hex extends php_user_filter
     /**
      * @see stream_filter_register()
      */
+    #[ReturnTypeWillChange]
     public function filter($in, $out, &$consumed, $closing)
     {
         while ($bucket = stream_bucket_make_writeable($in)) {

lib/Horde/Stream/Filter/Crc32.php

@@ -28,6 +28,7 @@ class Horde_Stream_Filter_Crc32 extends php_user_filter
     /**
      * @see stream_filter_register()
      */
+    #[ReturnTypeWillChange]
     public function onCreate()
     {
         $this->params->crc32 = 0;
@@ -38,6 +39,7 @@ public function onCreate()
     /**
      * @see stream_filter_register()
      */
+    #[ReturnTypeWillChange]
     public function filter($in, $out, &$consumed, $closing)
     {
         while ($bucket = stream_bucket_make_writeable($in)) {

lib/Horde/Stream/Filter/Eol.php

@@ -56,6 +56,7 @@ class Horde_Stream_Filter_Eol extends php_user_filter
     /**
      * @see stream_filter_register()
      */
+    #[ReturnTypeWillChange]
     public function onCreate()
     {
         $eol = isset($this->params['eol'])
@@ -82,6 +83,7 @@ public function onCreate()
     /**
      * @see stream_filter_register()
      */
+    #[ReturnTypeWillChange]
     public function filter($in, $out, &$consumed, $closing)
     {
         while ($bucket = stream_bucket_make_writeable($in)) {

lib/Horde/Stream/Filter/Htmlspecialchars.php

@@ -27,6 +27,7 @@ class Horde_Stream_Filter_Htmlspecialchars extends php_user_filter
     /**
      * @see stream_filter_register()
      */
+    #[ReturnTypeWillChange]
     public function filter($in, $out, &$consumed, $closing)
     {
         while ($bucket = stream_bucket_make_writeable($in)) {

lib/Horde/Stream/Filter/Null.php

@@ -41,6 +41,7 @@ class Horde_Stream_Filter_Null extends php_user_filter
     /**
      * @see stream_filter_register()
      */
+    #[ReturnTypeWillChange]
     public function onCreate()
     {
         $this->_replace = isset($this->params->replace)
@@ -53,6 +54,7 @@ public function onCreate()
     /**
      * @see stream_filter_register()
      */
+    #[ReturnTypeWillChange]
     public function filter($in, $out, &$consumed, $closing)
     {
         while ($bucket = stream_bucket_make_writeable($in)) {