loongson/pypi: links for custom-streamlit

loongson/mirror custom-streamlit-1.20.0.tar.gz
loongson/mirror custom_streamlit-1.20.0-py3-none-any.whl
loongson/mirror custom-streamlit-1.19.0.tar.gz
loongson/mirror custom_streamlit-1.19.0-py3-none-any.whl
loongson/mirror custom_streamlit-1.19.0-py2.py3-none-any.whl