Bump mustache from 0.8.2 to 4.0.0
Bump mustache from 0.8.2 to 4.0.0

Bumps [mustache](https://github.com/janl/mustache.js) from 0.8.2 to 4.0.0.
- [Release notes](https://github.com/janl/mustache.js/releases)
- [Changelog](https://github.com/janl/mustache.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/janl/mustache.js/compare/0.8.2...v4.0.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
yoksel/grunt-prototyper,yoksel/grunt-prototyper