Bug#1014078: RFS: librosa/0.9.2-1 [ITP] -- Python package for music and audio analysis

[Bastian Germann <bage@debian.org>]

Please fix the autopkgtest:

Testing with python3.9:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/librosa/__init__.py", line 208, in <module>
    from ._cache import cache
  File "/usr/lib/python3/dist-packages/librosa/_cache.py", line 6, in <module>
    from joblib import Memory
ModuleNotFoundError: No module named 'joblib'
autopkgtest [03:16:28]: test autodep8-python3: -----------------------]
autodep8-python3     FAIL non-zero exit status 1