Updated classes fromArray signatures (in-progress)

src/TgBotLib/Objects/ChatMember/ChatMemberAdministrator.php

@@ -210,8 +210,13 @@
         /**
          * @inheritDoc
          */
-        public static function fromArray(array $data): ChatMemberAdministrator
+        public static function fromArray(?array $data): ?ChatMemberAdministrator
         {
+            if($data === null)
+            {
+                return null;
+            }
+
             $object = new self();
             $object->status = ChatMemberStatus::ADMINISTRATOR;
             $object->user = isset($data['user']) ? User::fromArray($data['user']) : null;