Update Rust crate crossbeam to v0.8.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
crossbeam	dependencies	patch	0.8.0 → 0.8.4

---

Release Notes

crossbeam-rs/crossbeam (crossbeam)

v0.8.4

Compare Source

• Remove dependency on cfg-if. (#​1072)

v0.8.3

Compare Source

• Bump the minimum supported Rust version to 1.61. (#​1037)

v0.8.2

Compare Source

• Bump the minimum supported Rust version to 1.38. (#​877)

v0.8.1

Compare Source

• Support targets that do not have atomic CAS on stable Rust (#​698)

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[coveralls]

Pull Request Test Coverage Report for Build 9019063986

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 23 unchanged lines in 7 files lost coverage.
• Overall coverage increased (+2.4%) to 24.253%

---

Files with Coverage Reduction	New Missed Lines	%
crates/proto/src/node/expand_volume.rs	1	0.0%
crates/proto/src/node/get_volume_stats.rs	1	0.0%
crates/proto/src/node/publish_volume.rs	1	0.0%
crates/proto/src/controller/validate_volume_capabilities.rs	2	0.0%
crates/mount-utils/src/utils.rs	2	92.65%
crates/proto/src/volume.rs	7	0.0%
crates/mount-utils/src/unix.rs	9	56.44%

Totals
Change from base Build 615100636:	2.4%
Covered Lines:	641
Relevant Lines:	2643

---

💛 - Coveralls