sink: Add __all__ list
sink: Add __all__ list

jodal/pyspotify,felix1m/pyspotify,kotamat/pyspotify,mopidy/pyspotify,kotamat/pyspotify,felix1m/pyspotify,jodal/pyspotify,kotamat/pyspotify,felix1m/pyspotify,jodal/pyspotify,mopidy/pyspotify