Bump minimist, mkdirp, loader-fs-cache and @vue/cli-plugin-unit-mocha (…

…#481)

Bumps [minimist](https://github.com/minimistjs/minimist) to 1.2.8 and updates ancestor dependencies [minimist](https://github.com/minimistjs/minimist), [mkdirp](https://github.com/isaacs/node-mkdirp), [loader-fs-cache](https://github.com/viankakrisna/loader-fs-cache) and [@vue/cli-plugin-unit-mocha](https://github.com/vuejs/vue-cli/tree/HEAD/packages/@vue/cli-plugin-unit-mocha). These dependencies need to be updated together.


Updates `minimist` from 1.2.0 to 1.2.8
- [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
- [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 1.0.2 to 1.0.3
- [Commits](https://github.com/viankakrisna/loader-fs-cache/commits)

Updates `@vue/cli-plugin-unit-mocha` from 3.11.0 to 5.0.8
- [Release notes](https://github.com/vuejs/vue-cli/releases)
- [Changelog](https://github.com/vuejs/vue-cli/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vue-cli/commits/v5.0.8/packages/@vue/cli-plugin-unit-mocha)

---
updated-dependencies:
- dependency-name: minimist
  dependency-type: indirect
- dependency-name: mkdirp
  dependency-type: indirect
- dependency-name: loader-fs-cache
  dependency-type: indirect
- dependency-name: "@vue/cli-plugin-unit-mocha"
  dependency-type: direct:development
...

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