Update dependency mkdirp to v1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mkdirp	^0.5.1 -> ^1.0.0

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Release Notes

isaacs/node-mkdirp

v1.0.4

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v1.0.3

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v1.0.2

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v1.0.1

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v1.0.0

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v0.5.6

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