community/dust: upgrade to 0.8.1

https://github.com/bootandy/dust/compare/v0.8.0...v0.8.1

- Improve help text
- Increment version
- add aarch64 gnu and musl cross targets
- Update README.md
- Fix archive/directory check in platform.rs
- Bump regex from 1.5.4 to 1.5.5
- Refactor: tweak utils function
- Fix: Allow -n to be used with -d
- Rename variable
- New Version