root/pypi: links for slack-progress

root/pypi slack-progress-0.5.tar.gz
root/pypi slack_progress-0.5-py2.py3-none-any.whl
root/pypi slack-progress-0.4.tar.gz
root/pypi slack_progress-0.4-py2.py3-none-any.whl
root/pypi slack-progress-0.3.tar.gz
root/pypi slack-progress-0.2.tar.gz