Attempt to fix macos ci by pinning numba (#39875)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39875
Numba released a new version (0.50) that is causing problems with
librosa (we use this as a test dependency). Try pinning the version of
numba to temporarily fix. I am not actually sure if this is going to
work because it is unclear when we actually install numba.
Test Plan: - wait for CI.
Reviewed By: mruberry
Differential Revision: D22005838
Pulled By: zou3519
fbshipit-source-id: 4bccfa622c82533d85631052e4ad273617ea31d7
