Use SoXR for resampling

[yoyololicon]

Hi @jpauwels,

Just a suggestion from a Mac Pro M1 user.
The binary libsamplerate.dylib comes with samplerate was built in x86, not ARM.
I did have libsamplerate installed on my Mac, but I don't know why the samplerate couldn't find it, so I have to copy the built binaries into the package directory manually. It works, but it's a bit inconvenient.

On the other hand, soxr is compatible with both x86 and ARM processors. It runs faster than samplerate while having the same resample quality. librosa has dropped resampy as a dependency and moved to soxr. I recommend we follow the same, and it also makes the installation for M1 users a bit easier.

Just some thoughts after spending some time figuring out how to link the library file :)