pip install from the README.md does not work

[cuducos]

In the README.md we have:

2. Install the ckanext-versioning Python package into your virtual environment:

pip install ckanext-versioning

But it doesn't work:

$  pip install ckanext-versioning
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
ERROR: Could not find a version that satisfies the requirement ckanext-versioning (from versions: none)
ERROR: No matching distribution found for ckanext-versioning

1. Is it publish to PyPI?
   1. If so: what's the correct package name so we can fix the docs?
   2. If not: should we publish it?
      1. If not: should we add instructions to install form GitHub?

[chobeat]

I tried to install from github but it's incompatible with ckan 2.9. It raises an error. So I guess it requires some more work