Bump tokio from 1.17.0 to 1.20.4 in /completions

[dependabot[bot]]

Bumps tokio from 1.17.0 to 1.20.4.

Release notes

Sourced from tokio's releases.

Tokio v1.20.2

1.20.2 (September 27, 2022)

This release removes the dependency on the once_cell crate to restore the MSRV of the 1.20.x LTS release. (#5048)

#5048: tokio-rs/tokio#5048

Tokio v1.20.1

1.20.1 (July 25, 2022)

Fixed

• chore: fix version detection in build script (#4860)

#4860: tokio-rs/tokio#4860

Tokio v1.20.0

1.20.0 (July 12, 2022)

Added

• tokio: add track_caller to public APIs (#4772, #4791, #4793, #4806, #4808)
• sync: Add has_changed method to watch::Ref (#4758)

Changed

• time: remove src/time/driver/wheel/stack.rs (#4766)
• rt: clean up arguments passed to basic scheduler (#4767)
• net: be more specific about winapi features (#4764)
• tokio: use const initialized thread locals where possible (#4677)
• task: various small improvements to LocalKey (#4795)

Fixed

Documented

• fs: warn about performance pitfall (#4762)
• chore: fix spelling (#4769)
• sync: document spurious failures in oneshot (#4777)
• sync: add warning for watch in non-Send futures (#4741)
• chore: fix typo (#4798)

Unstable

• joinset: rename join_one to join_next (#4755)
• rt: unhandled panic config for current thread rt (#4770)

#4677: tokio-rs/tokio#4677 #4741: tokio-rs/tokio#4741 #4755: tokio-rs/tokio#4755 #4758: tokio-rs/tokio#4758 #4762: tokio-rs/tokio#4762

... (truncated)

Commits

• f3ce29a chore: prepare Tokio v1.20.4 release
• 0d8fe5f Merge branch 'tokio-1.18.x' into tokio-1.20.x
• 171ce0f chore: prepare Tokio v1.18.5 release
• d6ea7a7 Add T: Unpin bound to ReadHalf::unsplit
• ba81945 chore: prepare Tokio 1.20.3 release
• 763bdc9 ci: run WASI tasks using latest Rust
• 9f98535 Merge remote-tracking branch 'origin/tokio-1.18.x' into fix-named-pipes-1.20
• 9241c3e chore: prepare Tokio v1.18.4 release
• 699573d net: fix named pipes server configuration builder
• 3d95a46 chore: prepare Tokio v1.20.2 (#5055)
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