Update dependency qs to v6.9.4

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
qs	dependencies	patch	6.9.1 -> 6.9.4

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Release Notes

ljharb/qs

v6.9.4

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• [Fix] stringify: when arrayFormat is comma, respect serializeDate (#​364)
• [Refactor] stringify: reduce branching (part of #​350)
• [Refactor] move maybeMap to utils
• [Dev Deps] update browserify, tape

v6.9.3

Compare Source

• [Fix] proper comma parsing of URL-encoded commas (#​361)
• [Fix] parses comma delimited array while having percent-encoded comma treated as normal text (#​336)

v6.9.2

Compare Source

• [Fix] parse: Fix parsing array from object with comma true (#​359)
• [Fix] parse: throw a TypeError instead of an Error for bad charset (#​349)
• [meta] ignore eclint transitive audit warning
• [meta] fix indentation in package.json
• [meta] add tidelift marketing copy
• [Dev Deps] update eslint, @ljharb/eslint-config, object-inspect, has-symbols, tape, mkdirp, iconv-lite
• [actions] add automatic rebasing / merge commit blocking

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