root/pypi: links for chemfit

root/pypi chemfit-2.3.1-py3-none-any.whl
root/pypi chemfit-2.3.0-py3-none-any.whl
root/pypi chemfit-2.2.0-py3-none-any.whl
root/pypi chemfit-2.1.1-py3-none-any.whl
root/pypi chemfit-2.1.0-py3-none-any.whl