Sending media group raises FunctionClauseError

[danielkirch]

Hello,

thank you for developing this library.

I have been trying to send a media group (e.g. multiple images in one message) and I encounter the following issue:

iex(3)> Nadia.API.request("sendMediaGroup", [chat_id: chat_id, media: Jason.encode!([%{type: "photo", media: file_id_1}, %{type: "photo", media: file_id_2}])])
** (FunctionClauseError) no function clause matching in anonymous fn/2 in Kernel.struct/2    
    
    The following arguments were given to anonymous fn/2 in Kernel.struct/2:
    
        # 1
        %{
          chat: %{first_name: "first_name", id: 123456789, type: "private"},
          date: 1606318961,
          from: %{...},
          media_group_id: "...",
          message_id: 30,
          photo: [
            %{
              file_id: "...",
              file_size: 544,
              file_unique_id: "...",
              height: 38,
              width: 64
            }
          ]
        }
    
        # 2
        %Nadia.Model.Message{
          audio: nil,
          caption: nil,
          channel_chat_created: nil,
          chat: nil,
          contact: nil,
          date: nil,
          delete_chat_photo: nil,
          document: nil,
          edit_date: nil,
          entities: nil,
          forward_date: nil,
          forward_from: nil,
          forward_from_chat: nil,
          from: nil,
          group_chat_created: nil,
          left_chat_member: nil,
          location: nil,
          message_id: nil,
          migrate_from_chat_id: nil,
          migrate_to_chat_id: nil,
          new_chat_member: nil,
          new_chat_photo: [],
          new_chat_title: nil,
          photo: [],
          pinned_message: nil,
          reply_to_message: nil,
          sticker: nil,
          supergroup_chat_created: nil,
          text: nil,
          venue: nil,
          video: nil,
          voice: nil
        }
    
    (elixir) lib/kernel.ex:2112: anonymous fn/2 in Kernel.struct/2
    (elixir) lib/enum.ex:1948: Enum."-reduce/3-lists^foldl/2-0-"/3
    (nadia) lib/nadia/api.ex:15: Nadia.API.process_response/2

The message is sent correctly, but it crashes on parsing the response.
Would be nice if you could add support for that :-)