Bump mkdirp from 1.0.4 to 2.1.5

[dependabot[bot]]

Bumps mkdirp from 1.0.4 to 2.1.5.

Changelog

Sourced from mkdirp's changelog.

Changers Lorgs!

2.1

Export CommonJS module without a .default dangly wart. (A synthetic .default has been added just in case anyone is already relying on that from v2.0.)

2.0

Export hybrid module with TypeScript types.

1.0

Full rewrite. Essentially a brand new module.

• Return a promise instead of taking a callback.
• Use native fs.mkdir(path, { recursive: true }) when available.
• Drop support for outdated Node.js versions. (Technically still works on Node.js v8, but only 10 and above are officially supported.)

0.x

Original and most widely used recursive directory creation implementation in JavaScript, dating back to 2010.

Commits

• a2d14cf 2.1.5
• 17715e0 export correct types, at top lvl and in require exports
• a7886fc 2.1.4
• bafbf7f add declarationMap to tsconfig
• 3fa283c one more windows test path fix
• 204e1a0 test: more windows path string fixing
• ebd167d normalize paths in tests for Windows' benefit
• 11cd075 ci: TESTS WILL RUN AS LONG AS THEY HAVE TO
• 78d1a8a deploy typedocs to gh pages
• fa2f0b3 add link to projects homepage from gh page
• Additional commits viewable in compare view

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[github-actions[bot]]

This pull request has merge conflicts that must be resolved before it can be merged.