Log Message:
py-fs: updated to 2.4.14

2.4.14

Added

- Added `fs.copy.copy_file_if`, `fs.copy.copy_dir_if`, and `fs.copy.copy_fs_if`.
- Added `fs.base.FS.getmodified`.

Changed

- FTP servers that do not support the MLST command now try to use the MDTM command to
  retrieve the last modification timestamp of a resource.

Fixed

- Fixed performance bugs in `fs.copy.copy_dir_if_newer`. Test cases were adapted \ 
to catch those bugs in the future.
- Fixed precision bug for timestamps in `fs.OSFS.setinfo`.