The website itself still uses the v3 Kraken endpoint.
https://api.twitch.tv/kraken/channels/twitchdev
{
"mature": false,
"status": "Twitch Developers Live",
"broadcaster_language": "en",
"display_name": "twitchdev",
"game": "Creative",
"language": "en",
"_id": 141981764,
"name": "twitchdev",
"created_at": "2016-12-14T20:32:28Z",
"updated_at": "2018-02-19T02:36:16Z",
"partner": true,
"logo": "https://static-cdn.jtvnw.net/jtv_user_pictures/twitchdev-profile_image-d2f9d60c77c1505a-300x300.png",
"video_banner": "https://static-cdn.jtvnw.net/jtv_user_pictures/twitchdev-channel_offline_image-5f54d2c2ff90aaac-1920x1080.jpeg",
"profile_banner": "https://static-cdn.jtvnw.net/jtv_user_pictures/twitchdev-profile_banner-bd01d2c3893dbc8f-480.jpeg",
"profile_banner_background_color": null,
"url": "https://www.twitch.tv/twitchdev",
"views": 776628,
"followers": 4071,
"delay": null,
"banner": null,
"background": null,
"_links": { ... }
}