build(deps): bump qs from 6.5.1 to 6.9.1

[dependabot-preview]

Bumps qs from 6.5.1 to 6.9.1.

Changelog

Sourced from qs's changelog.

6.9.1

• [Fix] parse: with comma true, handle field that holds an array of arrays (#335)
• [Fix] parse: with comma true, do not split non-string values (#334)
• [meta] add funding field
• [Dev Deps] update eslint, @ljharb/eslint-config
• [Tests] use shared travis-ci config

6.9.0

• [New] parse/stringify: Pass extra key/value argument to decoder (#333)
• [Dev Deps] update eslint, @ljharb/eslint-config, evalmd
• [Tests] parse: add passing arrayFormat tests
• [Tests] add posttest using npx aud to run npm audit without a lockfile
• [Tests] up to node v12.10, v11.15, v10.16, v8.16
• [Tests] Buffer.from in node v5.0-v5.9 and v4.0-v4.4 requires a TypedArray

6.8.0

• [New] add depth=false to preserve the original key; [Fix] depth=0 should preserve the original key (#326)
• [New] [Fix] stringify symbols and bigints
• [Fix] ensure node 0.12 can stringify Symbols
• [Fix] fix for an impossible situation: when the formatter is called with a non-string value
• [Refactor] formats: tiny bit of cleanup.
• [Dev Deps] update eslint, @ljharb/eslint-config, browserify, safe-publish-latest, iconv-lite, tape
• [Tests] add tests for depth=0 and depth=false behavior, both current and intuitive/intended (#326)
• [Tests] use eclint instead of editorconfig-tools
• [docs] readme: add security note
• [meta] add github sponsorship
• [meta] add FUNDING.yml
• [meta] Clean up license text so it’s properly detected as BSD-3-Clause

6.7.0

• [New] stringify/parse: add comma as an arrayFormat option (#276, #219)
• [Fix] correctly parse nested arrays (#212)
• [Fix] utils.merge: avoid a crash with a null target and a truthy non-array source, also with an array source
• [Robustness] stringify: cache Object.prototype.hasOwnProperty
• [Refactor] utils: isBuffer: small tweak; add tests
• [Refactor] use cached Array.isArray
• [Refactor] parse/stringify: make a function to normalize the options
• [Refactor] utils: reduce observable [[Get]]s
• [Refactor] stringify/utils: cache Array.isArray
• [Tests] always use String(x) over x.toString()
• [Tests] fix Buffer tests to work in node < 4.5 and node < 5.10
• [Tests] temporarily allow coverage to fail

6.6.0

• [New] Add support for iso-8859-1, utf8 "sentinel" and numeric entities (#268)
• [New] move two-value combine to a utils function (#189)
• [Fix] stringify: fix a crash with strictNullHandling and a custom filter/serializeDate (#279)
• [Fix] when parseArrays is false, properly handle keys ending in [] (#260)
• [Fix] stringify: do not crash in an obscure combo of interpretNumericEntities, a bad custom decoder, & iso-8859-1
• [Fix] utils: merge: fix crash when source is a truthy primitive & no options are provided

... (truncated)

Commits

• 7b36800 v6.9.1
• 6151be3 [Tests] use shared travis-ci config
• b9a032f [meta] add funding field
• 1f35831 [Dev Deps] update eslint, @ljharb/eslint-config
• f884e2d [Fix] parse: with comma true, handle field that holds an array of arrays
• 698b683 [fix] parse: with comma true, do not split non-string values
• 670254b v6.9.0
• dadf9db [Tests] parse: add passing arrayFormat tests
• df0cb44 [Dev Deps] update eslint
• 7f216ee [New] parse/stringify: Pass extra key/value argument to decoder
• Additional commits viewable in compare view

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