Update NOTICE

NOTICE

@@ -127,6 +127,7 @@ The following software have components provided under the terms of this license:
 - pytest-cov (from https://github.com/pytest-dev/pytest-cov)
 - pytest-httpx (from https://colin-b.github.io/pytest_httpx/)
 - pytest-mock (from https://github.com/pytest-dev/pytest-mock/)
+- redis (from http://github.com/andymccurdy/redis-py)
 - six (from http://pypi.python.org/pypi/six/)
 - sniffio (from https://github.com/python-trio/sniffio)
 - toml (from https://github.com/uiri/toml)