* Added `fs.copy.copy_file_if`, `fs.copy.copy_dir_if`, and `fs.copy.copy_fs_if`.
* Added `fs.base.FS.getmodified`.
* 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 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`.
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-fs?expand=0&rev=27