chore(deps): update dependency qs to v6.12.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
qs	6.11.2 -> 6.12.0

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Release Notes

ljharb/qs (qs)

### [`v6.12.0`](https://togithub.com/ljharb/qs/blob/HEAD/CHANGELOG.md#6120) [Compare Source](https://togithub.com/ljharb/qs/compare/v6.11.2...v6.12.0) - \[New] `parse`/`stringify`: add `decodeDotInKeys`/`encodeDotKeys` options ([#​488](https://togithub.com/ljharb/qs/issues/488)) - \[New] `parse`: add `duplicates` option - \[New] `parse`/`stringify`: add `allowEmptyArrays` option to allow \[] in object values ([#​487](https://togithub.com/ljharb/qs/issues/487)) - \[Refactor] `parse`/`stringify`: move allowDots config logic to its own variable - \[Refactor] `stringify`: move option-handling code into `normalizeStringifyOptions` - \[readme] update readme, add logos ([#​484](https://togithub.com/ljharb/qs/issues/484)) - \[readme] `stringify`: clarify default `arrayFormat` behavior - \[readme] fix line wrapping - \[readme] remove dead badges - \[Deps] update `side-channel` - \[meta] make the dist build 50% smaller - \[meta] add `sideEffects` flag - \[meta] run build in prepack, not prepublish - \[Tests] `parse`: remove useless tests; add coverage - \[Tests] `stringify`: increase coverage - \[Tests] use `mock-property` - \[Tests] `stringify`: improve coverage - \[Dev Deps] update ` @​ljharb/eslint-config `, `aud`, `has-override-mistake`, `has-property-descriptors`, `mock-property`, `npmignore`, `object-inspect`, `tape` - \[Dev Deps] pin `glob`, since v10.3.8+ requires a broken `jackspeak` - \[Dev Deps] pin `jackspeak` since 2.1.2+ depends on npm aliases, which kill the install process in npm < 6

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