Bump crossbeam-deque from 0.7.3 to 0.7.4 in /kinto_integrity

Bumps [crossbeam-deque](https://github.com/crossbeam-rs/crossbeam) from 0.7.3 to 0.7.4.
- [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
- [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
- [Commits](crossbeam-rs/crossbeam@crossbeam-0.7.3...crossbeam-deque-0.7.4)

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

Signed-off-by: dependabot[bot] <[email protected]>