loongson/pypi: links for airtight

loongson/mirror airtight-0.2.0.tar.gz
loongson/mirror airtight-0.2.0a3.tar.gz
loongson/mirror airtight-0.2.0a2.tar.gz
loongson/mirror airtight-0.2.0a1.tar.gz
loongson/mirror airtight-0.1.tar.gz