loongson/pypi: links for notion-tree

loongson/mirror notion_tree-0.0.1a4-py3-none-any.whl
loongson/mirror notion_tree-0.0.1a3-py3-none-any.whl
loongson/mirror notion_tree-0.0.1a2-py3-none-any.whl
loongson/mirror notion_tree-0.0.1a1-py3-none-any.whl