Bump minimist, mkdirp, loader-fs-cache, handlebars and npm in /webapp (…

…#275)

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), [handlebars](https://github.com/handlebars-lang/handlebars.js) and [npm](https://github.com/npm/cli). 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 `minimist` from 1.2.5 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 1.0.1 to 1.0.3
- [Commits](https://github.com/viankakrisna/loader-fs-cache/commits)

Updates `handlebars` from 4.1.0 to 4.7.8
- [Release notes](https://github.com/handlebars-lang/handlebars.js/releases)
- [Changelog](https://github.com/handlebars-lang/handlebars.js/blob/v4.7.8/release-notes.md)
- [Commits](handlebars-lang/handlebars.js@v4.1.0...v4.7.8)

Updates `npm` from 6.5.0 to 6.14.18
- [Release notes](https://github.com/npm/cli/releases)
- [Changelog](https://github.com/npm/cli/blob/v6.14.18/CHANGELOG.md)
- [Commits](npm/cli@v6.5.0...v6.14.18)

---
updated-dependencies:
- dependency-name: minimist
  dependency-type: indirect
- 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
- dependency-name: npm
  dependency-type: direct:production
...

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