Helpers for filling in image and url templates received from API responses.
imageTemplateUrl : Basics.Int -> Basics.Int -> String -> String
Fills in templates with {width} and {height}.
Twitch.Template.imageTemplateUrl 168 95 stream.thumbnailUrl
imagePercentTemplateUrl : Basics.Int -> Basics.Int -> String -> String
Fills in templates with %{width} and %{height}.
Twitch.Template.imagePercentTemplateUrl 320 180 video.thumbnailUrl