2.3.0rc1

What's Changed

• Fix BufferedReader error caused by opening an empty file in S3 in "rb" mode by @belltailjp in #270
• Sphinx 5 warns as language is None by @kuenishi in #274
• Control buffering for underlying file object for Zip(FS) by @kuenishi in #273
• Sparse file local cache by @kuenishi in #275
• Thread safety by @kuenishi in #277
• Multiprocessing-safe sparse file cache by @kuenishi in #278
• Limit the sparse cache size by @kuenishi in #279

Sparse file cache example with multiprocessing would be like:

        import os
        from pfio.v2 import from_url

        with from_url("s3://bucket/your.zip",
                      local_cache=True, reset_on_fork=True) as fs:

          pid = os.fork()
          if pid:
            os.wait()
          else:
            with fs.open("file-in-zip.jpg", 'rb') as fp:
              data = rp.read()

$ sha1sum dist/pfio-2.3.0rc1*
782f5ef08f08e4de64dac5175b300bce3dd46a38  dist/pfio-2.3.0rc1-py3-none-any.whl
4d21ede0d89f059830d681b74b8c464febd567e4  dist/pfio-2.3.0rc1.tar.gz

Full Changelog: 2.2.0...2.3.0rc1