py-fs: updated to 2.4.16

2.4.16

Changed

- Make `fs.zipfs._ZipExtFile` use the seeking mechanism implemented
  in the Python standard library in Python version 3.7 and later
- Mark `fs.zipfs.ReadZipFS` as a case-sensitive filesystem
- Optimized moving files between filesystems with syspaths.
- Fixed `fs.move.move_file` to clean up the copy on the destination in case of errors.
- `fs.opener.manage_fs` with `writeable=True` will now raise a `ResourceReadOnly`
  exception if the managed filesystem is not writeable.
- Marked filesystems wrapped with `fs.wrap.WrapReadOnly` as read-only.

(adam)