- Add missing BuildRequires on time-machine

- Update to v20.23.0:
# Features - 20.23.0
* Do not install wheel and setuptools seed packages for Python
3.12+. To restore the old behaviour use:
- for wheel use VIRTUALENV_WHEEL=bundle environment variable or
--wheel=bundle CLI flag,
- for setuptools use VIRTUALENV_SETUPTOOLS=bundle environment
variable or --setuptools=bundle CLI flag.
By @chrysle. (#2487)
* 3.12 support - by @gaborbernat. (#2558)
# Bugfixes - 20.23.0
* Prevent PermissionError when using venv creator on systems that
deliver files without user write permission - by @kulikjak.
(#2543)
* Upgrade setuptools to 67.7.2 from 67.6.1 and pip to 23.1.2 from
23.1 - by @szleb. (#2560)