modernize changelog management in packaging #34

[pbr] Generating ChangeLog
/Users/dhellmann/Envs/virtualenvwrapper/lib/python3.10/site-packages/setuptools/command/easy_install.py:144: EasyInstallDeprecationWarning: easy_install command is deprecated. Use build and pip and other standards-based tools.
  warnings.warn(
/Users/dhellmann/Envs/virtualenvwrapper/lib/python3.10/site-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.