Update dependency connect-redis to v6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
connect-redis	^5.2.0 -> ^6.0.0

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Release Notes

visionmedia/connect-redis

### [`v6.0.0`](https://togithub.com/visionmedia/connect-redis/releases/v6.0.0) [Compare Source](https://togithub.com/visionmedia/connect-redis/compare/v5.2.0...v6.0.0) ##### Breaking changes - [#​327](https://togithub.com/visionmedia/connect-redis/issues/327) - Remove Node 10 support ([@​wavded](https://togithub.com/wavded)) ##### Maintenance - [#​326](https://togithub.com/visionmedia/connect-redis/issues/326) - Fix broken windows ([@​wavded](https://togithub.com/wavded))

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