Adding 'counters' field to profile_fields function

[mvpant]

VK api allows to do request with 'counters' field, which is currently missing. Response of such request can look like this:

{ "response": [{ "id": 9999, "first_name": "test", "last_name": "test", "is_closed": false, "can_access_closed": true, "counters": { "albums": 18, "videos": 206, "audios": 380, "notes": 107, "photos": 5444, "gifts": 99, "friends": 5304, "online_friends": 744, "mutual_friends": 0, "user_photos": 1984, "followers": 1307, "subscriptions": 0, "pages": 74 } }] }

users.get