loongson/pypi: links for sparse-merkle-tree

loongson/mirror sparse-merkle-tree-0.3.0.tar.gz
loongson/mirror sparse_merkle_tree-0.3.0-py3-none-any.whl
loongson/mirror sparse-merkle-tree-0.2.0.tar.gz
loongson/mirror sparse-merkle-tree-0.1.0.tar.gz