Add missing return types to magic methods

Author: wouterj

Adapter/ExtLdap/Connection.php

@@ -46,6 +46,9 @@ public function __sleep(): array
         throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
     }
 
+    /**
+     * @return void
+     */
     public function __wakeup()
     {
         throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);

Adapter/ExtLdap/Query.php

@@ -36,6 +36,9 @@ public function __sleep(): array
         throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
     }
 
+    /**
+     * @return void
+     */
     public function __wakeup()
     {
         throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);