* Added support for ZSTANDARD archives with the zstd tool.
* Improved patool diff output: when two archives each have
only one entry, compare those entries directly instead of
the parent directory.
* Replace deprecated distutils with setuptools to fix build errors
with modern Python environments.
Closes: GH bug 114, 103
* Disable password prompting with 7z in non-interactive mode with
the option "-p-".
Thanks to Pascua Theus for the patch.
* Disable sandbox mode for file(1) to fix detection of compressed tar
archives on systems with libseccomp.
Thanks to Alfred Wingate for the patch.
* Remove read-only directories after a diff comparison of two archives.
Thanks to c01o for the patch.