build(deps): bump mkdirp from 0.5.4 to 0.5.5

Bumps [mkdirp](https://github.com/isaacs/node-mkdirp) from 0.5.4 to 0.5.5.
- [Release notes](https://github.com/isaacs/node-mkdirp/releases)
- [Changelog](https://github.com/isaacs/node-mkdirp/blob/master/CHANGELOG.md)
- [Commits](isaacs/node-mkdirp@v0.5.4...v0.5.5)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>