Update dependency multimatch to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
multimatch	^2.1.0 -> 6.0.0

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Release Notes

sindresorhus/multimatch

v6.0.0

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Breaking

• Require Node.js 12.20 d841a69
• This package is now pure ESM. Please read this.

v5.0.0

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Breaking

• Require Node.js 10 35a5b6c
• Preserve input order for the returned matching paths (#​30) 18d778b
  It's only breaking if you depended on the previous order.

v4.0.0

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Breaking:

• Require Node.js 8 ed2ce60

Enhancements:

• Add TypeScript definition (#​27) 8942da8

v3.0.0

Compare Source

Breaking:

• Require Node.js 6 98a7290

Other:

• Bump minimatch (https://github.com/sindresorhus/multimatch/issues/26) 98a7290

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