Update upstream source from tag 'upstream/3.6.1'

.github/workflows/release.yml

Changes.rst

PKG-INFO

README.rst

argcomplete/_check_module.py

argcomplete/bash_completion.d/_python-argcomplete

argcomplete/completers.py

argcomplete/finders.py

argcomplete/packages/_argparse.py

argcomplete/packages/_shlex.py

argcomplete/scripts/activate_global_python_argcomplete.py

...e/scripts/python_argcomplete_check_easy_install_script.py

argcomplete/shell_integration.py

common.mk

debian/changelog

docs/conf.py

pyproject.toml

test/test.py