Replace the deprecated each with current and next

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

Author: ChristophWurst

src/Patchwork/Utf8/WindowsStreamWrapper.php

@@ -106,7 +106,8 @@ public function dir_opendir($path, $options)
 
     public function dir_readdir()
     {
-        if (list(, $c) = each($this->handle)) {
+        if (($c = current($this->handle)) !== false) {
+        	next($this->handle);
             return $c;
         }