Bump redis from 3.3.8 to 3.5.3 (#745)
Bump redis from 3.3.8 to 3.5.3 (#745)

Bumps [redis](https://github.com/andymccurdy/redis-py) from 3.3.8 to 3.5.3.
- [Release notes](https://github.com/andymccurdy/redis-py/releases)
- [Changelog](https://github.com/andymccurdy/redis-py/blob/master/CHANGES)
- [Commits](https://github.com/andymccurdy/redis-py/compare/3.3.8...3.5.3)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
zarr-developers/zarr-python