Bump minimist, docpad and mkdirp

Bumps [minimist](https://github.com/minimistjs/minimist) to 1.2.8 and updates ancestor dependencies [minimist](https://github.com/minimistjs/minimist), [docpad](https://github.com/docpad/docpad) and [mkdirp](https://github.com/isaacs/node-mkdirp). These dependencies need to be updated together.


Updates `minimist` from 0.0.8 to 1.2.8
- [Changelog](https://github.com/minimistjs/minimist/blob/main/CHANGELOG.md)
- [Commits](minimistjs/minimist@v0.0.8...v1.2.8)

Updates `docpad` from 6.79.4 to 6.83.2
- [Changelog](https://github.com/docpad/docpad/blob/master/HISTORY.md)
- [Commits](docpad/docpad@v6.79.4...v6.83.2)

Updates `mkdirp` from 0.5.1 to 0.5.6
- [Changelog](https://github.com/isaacs/node-mkdirp/blob/main/CHANGELOG.md)
- [Commits](isaacs/node-mkdirp@0.5.1...v0.5.6)

---
updated-dependencies:
- dependency-name: minimist
  dependency-type: indirect
  dependency-group: npm_and_yarn-security-group
- dependency-name: docpad
  dependency-type: direct:production
  dependency-group: npm_and_yarn-security-group
- dependency-name: mkdirp
  dependency-type: indirect
  dependency-group: npm_and_yarn-security-group
...

Signed-off-by: dependabot[bot] <[email protected]>