[Deps] Update qs to 6.14.1

[Xmaxer]

There's a new security issue with the qs versions <6.14.1

https://security.snyk.io/vuln/SNYK-JS-QS-14724253

This is a non breaking update as far as I can see.

[ljharb]

This is fine, but it's also unnecessary because the fixed version is in-range.

[abk182]

There also issue with node.js version
package engines - "node": ">= 0.4"
dependency graph engines: "node": ">= 0.6" (in qs@6.14.1)

Maybe it's worth upgrading the engine?

[Xmaxer]

Sorry for the late reply. Yes, the fixed version is in range, but no harm in this either. If anything it shows that the engine versions are mismatched even if it is within range.

I can do it as part of this PR, it's up to the maintainer if they wish to proceed with this though.