root/pypi: links for prompt2

root/pypi prompt2-6.0.0rc5.tar.gz
root/pypi prompt2-6.0.0rc4.tar.gz
root/pypi prompt2-6.0.0rc3.tar.gz
root/pypi prompt2-5.2.3.tar.gz
root/pypi prompt2-5.2.2.tar.gz
root/pypi prompt2-5.2.1.tar.gz