fix(add_sticker): fixed #1

Author: okiscape

cogs/add_sticker.py

@@ -222,7 +222,7 @@ async def receive_stickera(self, message: cog.Message, state: cog.FSMContext):
             stickers = data.get("stickers", [])
             stickers.append(
                 {
-                    "emojis": emojis,
+                    "emojis": list(emojis),
                     "sticker": sticker_data,
                     "format": sticker_format,
                     "filename": filename,