Typo - Track.Kind.audion - audio?

[vade]

trafficstars

In Track.swift, the track kind is defined as

  public enum Kind : String {
        case video = "Video"
        case audion = "Audio"
    }

Should be

  public enum Kind : String {
        case video = "Video"
        case audio = "Audio"
    }

[meshula]

yes, a typo, please feel free to submit a PR