loongson/pypi: links for keyextractor

loongson/mirror KeyExtractor-0.1.2a1.dev1.tar.gz
loongson/mirror KeyExtractor-0.1.2a1.dev1-py3-none-any.whl
loongson/mirror KeyExtractor-0.1.1.dev3.tar.gz
loongson/mirror KeyExtractor-0.1.1.dev3-py3-none-any.whl
loongson/mirror KeyExtractor-0.1.1.dev2.tar.gz
loongson/mirror KeyExtractor-0.1.1.dev2-py3-none-any.whl