Chore(deps): Bump redis from 3.0.2 to 3.1.1 in /src

Bumps [redis](https://github.com/NodeRedis/node-redis) from 3.0.2 to 3.1.1.
- [Release notes](https://github.com/NodeRedis/node-redis/releases)
- [Changelog](https://github.com/NodeRedis/node-redis/blob/master/CHANGELOG.md)
- [Commits](https://github.com/NodeRedis/node-redis/compare/v3.0.2...v3.1.1

)

---
updated-dependencies:
- dependency-name: redis
  dependency-type: direct:production
...

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