root/pypi: links for observed

root/pypi observed-0.5.3.tar.gz
root/pypi observed-0.5.3-py3-none-any.whl
root/pypi observed-0.5.1.tar.gz
root/pypi observed-0.5.1-py2.py3-none-any.whl
root/pypi observed-0.4.zip
root/pypi observed-0.3.zip
root/pypi observed-0.2.4.zip
root/pypi observed-0.2.2.zip