Bump minimist, mkdirp, loader-fs-cache and handlebars

Bumps [minimist](https://github.com/minimistjs/minimist), [mkdirp](https://github.com/isaacs/node-mkdirp), [loader-fs-cache](https://github.com/viankakrisna/loader-fs-cache) and [handlebars](https://github.com/wycats/handlebars.js). These dependencies needed to be updated together.

Updates `minimist` from 1.2.0 to 1.2.8
- [Release notes](https://github.com/minimistjs/minimist/releases)
- [Changelog](https://github.com/minimistjs/minimist/blob/main/CHANGELOG.md)
- [Commits](minimistjs/minimist@v1.2.0...v1.2.8)

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

Updates `loader-fs-cache` from 1.0.1 to 1.0.3
- [Release notes](https://github.com/viankakrisna/loader-fs-cache/releases)
- [Commits](https://github.com/viankakrisna/loader-fs-cache/commits)

Updates `handlebars` from 4.0.12 to 4.7.7
- [Release notes](https://github.com/wycats/handlebars.js/releases)
- [Changelog](https://github.com/handlebars-lang/handlebars.js/blob/master/release-notes.md)
- [Commits](handlebars-lang/handlebars.js@v4.0.12...v4.7.7)

---
updated-dependencies:
- dependency-name: minimist
  dependency-type: indirect
- dependency-name: mkdirp
  dependency-type: indirect
- dependency-name: loader-fs-cache
  dependency-type: indirect
- dependency-name: handlebars
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>