Support VC Text channels.

[quinchs]

Summary

Discord has started the local testing for VC text channels, this should be implemented into labs.

[quinchs]

Example channel

{
    "id": "0000",
    "last_message_id": "0000",
    "type": 2,
    "name": "Imagine",
    "position": 0,
    "parent_id": "0000",
    "bitrate": 64000,
    "user_limit": 0,
    "rtc_region": null,
    "guild_id": "0000",
    "permission_overwrites": [],
    "nsfw": false
}