Update dependency mkdirp to ^0.5.6 - autoclosed

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
mkdirp	dependencies	patch	^0.5.1 -> ^0.5.6

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
Critical	9.8	CVE-2021-44906	#205

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Release Notes

isaacs/node-mkdirp (mkdirp)

### [`v0.5.6`](https://togithub.com/isaacs/node-mkdirp/compare/v0.5.5...v0.5.6) [Compare Source](https://togithub.com/isaacs/node-mkdirp/compare/v0.5.5...v0.5.6)

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