loongson/pypi: links for casting

loongson/mirror CASTING-0.1.4.tar.gz
loongson/mirror CASTING-0.1.4-py3-none-any.whl
loongson/mirror CASTING-0.1.3.tar.gz
loongson/mirror CASTING-0.1.3-py3-none-any.whl
loongson/mirror CASTING-0.1.2b0.tar.gz
loongson/mirror CASTING-0.1.2b0-py3-none-any.whl
loongson/mirror CASTING-0.1.1.tar.gz
loongson/mirror CASTING-0.1.1-py3-none-any.whl