BO34 - Create an endpoint to update informations about the conference's venue

[gregoriopalama]

Add an endpoint in the Venue API, mapped to PUT /venue The endpoint should be allowed to Devfest Organizers only.

The body should contain the informations about the venue:

• name (required);
• langitude (required);
• latitudde (required);
• address (required);
• mapId (optional). If provided, will use it to tell the Maps API to style the map with the corresponding style for the given mapId;
• description (optional);

The response will have a 200 HTTP Status code if the insert goes smooth, also providing the updated venue object in the response's body.