Missing currently_playing_type

[OmiCron07]

The PlaybackContext is missing the currently_playing_type property to know if it's a track or an ad currently playing.

[JohnnyCrazy]

It was added in https://github.com/JohnnyCrazy/SpotifyAPI-NET/releases/tag/3.1.0 ?

#292
ec99296

[OmiCron07]

Oh, sorry, I don't have it because I'm using the pull request #286. Is this PR will be accepted into the main branch?

[JohnnyCrazy]

Yes, but I need some more time reviewing it.