AudioAnalysis.track.mode is always null

[alexeynefdef]

Hey there! I'm trying to build a simple app using your very cool lib, but there is a problem:

Return value of AudioAnalysis.track.mode is always null.
I've already tried to get it with java HTTP client and it works properly so i guess there is a small bug.
Best regards

[dargmuesli]

The fix should soon be available as v7.2.1 🥳