Fix showing the webhook information in an Artisan command

[pavel-mironchik]

Getting a WebHook info using the artisan command php artisan telegram:webhook bot_name --info throws an exception now:

A cell must be a TableCell, a scalar or an object implementing "__toString()", "array" given. 

That's because of the WebhookInfo containing the allowed_updates field of the type array of string. Here is a link to the documentation: https://core.telegram.org/bots/api#webhookinfo.

The proposed change converts the received array to a string, so it could be easily represented in a console window:

************************
*     Webhook Info     *
************************

+------------------------+----------------------+
| Bot: bot_name                                 |
+------------------------+----------------------+
| Key                    | Info                 |
+------------------------+----------------------+
| Url                    |                      |
| Has Custom Certificate | No                   |
| Pending Update Count   | 0                    |
| Allowed Updates        | message              |
|                        | edited_message       |
|                        | channel_post         |
|                        | edited_channel_post  |
|                        | inline_query         |
|                        | chosen_inline_result |
|                        | callback_query       |
|                        | shipping_query       |
|                        | pre_checkout_query   |
|                        | poll                 |
|                        | poll_answer          |
|                        | my_chat_member       |
|                        | chat_member          |
|                        | chat_join_request    |
+------------------------+----------------------+

[irazasyed]

Thanks!