Bump librosa to 0.10.2-release branch

This fixes `AttributeError: module 'scipy.signal' has no attribute 'hann'` that occurs when trying to augment data using `automix.py`.

In librosa version 0.10.2.dev0, the `__trim_beats` in beat.py no longer uses scipy for hanning computation & now uses `np.hanning` instead.

requirements.txt

@@ -17,3 +17,4 @@ torchaudio>=0.8,<2.1
 tqdm
 treetable
 soundfile>=0.10.3;sys_platform=="win32"
+librosa @ git+https://github.com/librosa/librosa.git@c0266e4