loongson/pypi: links for context-helpers

loongson/mirror context-helpers-0.1.4.tar.gz
loongson/mirror context-helpers-0.1.3.tar.gz
loongson/mirror context-helpers-0.1.2.tar.gz
loongson/mirror context-helpers-0.1.1.tar.gz
loongson/mirror context-helpers-0.1.0.tar.gz