loongson/pypi: links for string-between

loongson/mirror string_between-0.0.7.tar.gz
loongson/mirror string_between-0.0.6.tar.gz
loongson/mirror string_between-0.0.5.tar.gz
loongson/mirror string_between-0.0.4.tar.gz
loongson/mirror string_between-0.0.1.tar.gz