loongson/pypi: links for mattermostwrapper

loongson/mirror mattermostwrapper-2.2.tar.gz
loongson/mirror mattermostwrapper-2.1.tar.gz
loongson/mirror mattermostwrapper-2.1-py2.py3-none-any.whl
loongson/mirror mattermostwrapper-2.0.tar.gz