py-argparse-manpage: updated to 4.5

News in v4.5

* We newly provide `build_manpages.build_py` and `build_manpages.install`
  command classes that are re-usable from `pyproject.toml`.  No need to
  provide `setup.py` because of `argparse-manpage`.

News in v4.4

* The `prog=` specifier (in setup.py/setup.cfg/pyproject.toml) is now
  better handled so it doesn't conflict with ArgumentParser(prog=..).
  Fixes https://github.com/praiskup/argparse-manpage/issues/79

(adam)