Add GetStickerSet method

src/TgBotLib/Objects/GetStickerSet.php

@@ -0,0 +1,38 @@
+<?php
+
+    namespace TgBotLib\Objects;
+
+    use TgBotLib\Abstracts\Method;
+    use TgBotLib\Bot;
+    use TgBotLib\Enums\Methods;
+    use TgBotLib\Objects\Stickers\StickerSet;
+
+    class GetStickerSet extends Method
+    {
+
+        /**
+         * @inheritDoc
+         */
+        public static function execute(Bot $bot, array $parameters = []): StickerSet
+        {
+            return StickerSet::fromArray(self::executeCurl(self::buildPost($bot, Methods::GET_STICKER_SET->value, $parameters)));
+        }
+
+        /**
+         * @inheritDoc
+         */
+        public static function getRequiredParameters(): ?array
+        {
+            return [
+                'name'
+            ];
+        }
+
+        /**
+         * @inheritDoc
+         */
+        public static function getOptionalParameters(): ?array
+        {
+            return null;
+        }
+    }