Bump redis from 2.8.0 to 3.1.1

Bumps [redis](https://github.com/NodeRedis/node-redis) from 2.8.0 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/v.2.8.0...v3.1.1)

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

package.json

@@ -146,7 +146,7 @@
     "mkdirp": "^0.5.1",
     "mozlog": "^2.2.0",
     "node-fetch": "^2.6.1",
-    "redis": "^2.8.0",
+    "redis": "^3.1.1",
     "redis-mock": "^0.47.0",
     "selenium-standalone": "^6.24.0",
     "ua-parser-js": "^0.7.28"