root/pypi: links for activitystreams2

root/pypi activitystreams2-0.5.0.tar.gz
root/pypi activitystreams2-0.5.0-py3-none-any.whl
root/pypi activitystreams2-0.5.0.dev1.tar.gz
root/pypi activitystreams2-0.5.0.dev1-py3-none-any.whl