feat: `--completions` option

Bump anstream from 0.6.4 to 0.6.18

Bumps [anstream](https://github.com/rust-cli/anstyle) from 0.6.4 to 0.6.18.
- [Commits](https://github.com/rust-cli/anstyle/compare/anstream-v0.6.4...anstream-v0.6.18)

---
updated-dependencies:
- dependency-name: anstream
dependency-type: indirect
...

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

Bump crossbeam-utils from 0.8.3 to 0.8.8

Bumps [crossbeam-utils](https://github.com/crossbeam-rs/crossbeam) from 0.8.3 to 0.8.8.
- [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
- [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crossbeam-rs/crossbeam/compare/crossbeam-utils-0.8.3...crossbeam-utils-0.8.8)

---
updated-dependencies:
- dependency-name: crossbeam-utils
dependency-type: indirect
...

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

Bump crossbeam-deque from 0.8.0 to 0.8.1

Bumps [crossbeam-deque](https://github.com/crossbeam-rs/crossbeam) from 0.8.0 to 0.8.1.
- [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
- [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crossbeam-rs/crossbeam/compare/crossbeam-deque-0.8.0...crossbeam-deque-0.8.1)

---
updated-dependencies:
- dependency-name: crossbeam-deque
dependency-type: indirect
...

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