Add support for message reaction count events

src/TgBotLib/Events/MessageReactionCountEvent.php

@@ -0,0 +1,31 @@
+<?php
+
+    namespace TgBotLib\Events;
+
+    use TgBotLib\Abstracts\UpdateEvent;
+    use TgBotLib\Bot;
+    use TgBotLib\Enums\UpdateEventType;
+    use TgBotLib\Objects\MessageReactionCountUpdated;
+
+    abstract class MessageReactionCountEvent extends UpdateEvent
+    {
+        /**
+         * @inheritDoc
+         */
+        public static function getEventType(): UpdateEventType
+        {
+            return UpdateEventType::MESSAGE_REACTION_COUNT;
+        }
+
+        /**
+         * Reactions to a message with anonymous reactions were changed. The bot must be an administrator in the chat
+         * and must explicitly specify "message_reaction_count" in the list of allowed_updates to receive these updates.
+         * The updates are grouped and can be sent with delay up to a few minutes.
+         *
+         * @return MessageReactionCountUpdated
+         */
+        protected function getMessageReactionCount(): MessageReactionCountUpdated
+        {
+            return $this->update->getMessageReactionCount();
+        }
+    }