Soundfile

Fixes a bug in the library discover on Linux, if no system library and no packaged library could be found.

Thank you, Barabazs, Andrew Murray, Jon Peirce, for contributions
to this release.

- Updated libsndfile to v1.2.0
- Improves precompiled library location, especially with py2app or cx-freeze.
- Now provide binary wheels for Linux x86_64
- Now prefers packaged libsndfile over system-installed libsndfile

Thank you, tennies, Hannes Helmholz, Christoph Boeddeker, Matt Vollrath, Matthias Geier, Jacek Konieczny, Boris Verkhovskiy, Jonas Haag, Eduardo Moguillansky, Panos Laganakos, Jarvy Jarvison, Domingo Ramirez, Tim Chagnon, Kyle Benesch, Fabian-Robert Stöter, Joe Todd

- MP3 support
- Adds binary wheels for macOS M1
- Improves compatibility with macOS, specifically for M1 machines
- Fixes file descriptor open for binary wheels on Windows and Python 3.5+
- Updates libsndfile to v1.1.0
- Adds get_strings method for retrieving all metadata at once
- Improves documentation, error messages and tests
- Displays length of very short files in samples
- Supports the file system path protocol (pathlib et al)

This is a pre-release

- Includes updated libsndfile 1.1.0 binaries for Windows 32/64, and macOS x86_64/arm64.
- Adds MP3 support.

This is a pre-release

- Includes updated libsndfile 1.1.0 binaries for Windows 32/64, and macOS x86_64/arm64.
- Adds MP3 support.

This is a pre-release

- Includes updated libsndfile 1.1.0 binaries for Windows 32/64, and macOS x86_64/arm64.
- Adds MP3 support.

Known issues:

- The included libsndfile.dll for Windows only supports file descriptor open on Python 3.5+.
- Virtual IO (opening file-like Python objects) [is broken](https://cffi.readthedocs.io/en/latest/using.html#callbacks) on some versions of macOS and SELinux.