Update dependency qs to v6.15.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
qs	6.14.1 → 6.15.0

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Release Notes

ljharb/qs (qs)

v6.15.0

Compare Source

• [New] parse: add strictMerge option to wrap object/primitive conflicts in an array (#​425, #​122)
• [Fix] duplicates option should not apply to bracket notation keys (#​514)

v6.14.2

Compare Source

• [Fix] parse: mark overflow objects for indexed notation exceeding arrayLimit (#​546)
• [Fix] arrayLimit means max count, not max index, in combine/merge/parseArrayValue
• [Fix] parse: throw on arrayLimit exceeded with indexed notation when throwOnLimitExceeded is true (#​529)
• [Fix] parse: enforce arrayLimit on comma-parsed values
• [Fix] parse: fix error message to reflect arrayLimit as max index; remove extraneous comments (#​545)
• [Robustness] avoid .push, use void
• [readme] document that addQueryPrefix does not add ? to empty output (#​418)
• [readme] clarify parseArrays and arrayLimit documentation (#​543)
• [readme] replace runkit CI badge with shields.io check-runs badge
• [meta] fix changelog typo (arrayLength → arrayLimit)
• [actions] fix rebase workflow permissions

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