Bump tokio from 1.16.1 to 1.20.1

Bumps tokio from 1.16.1 to 1.20.1.

Release notes

Sourced from tokio's releases.

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 #4764: tokio-rs/tokio#4764 #4766: tokio-rs/tokio#4766 #4767: tokio-rs/tokio#4767 #4769: tokio-rs/tokio#4769 #4770: tokio-rs/tokio#4770 #4772: tokio-rs/tokio#4772 #4777: tokio-rs/tokio#4777

... (truncated)

Commits

• c0746b6 chore: prepare Tokio v1.20.1 (#4861)
• b673eae chore: fix version detection in build script (#4860)
• b343767 chore: prepare Tokio v1.20.0 (#4830)
• be620e9 chore: fix ci by hard-coding nightly version for miri (#4825)
• ad942de chore: add a regression test for WASI (#4822)
• 4daeea8 sync: add track_caller to public APIs (#4808)
• 18efef7 signal: add track_caller to public APIs (#4806)
• d8cad13 tests: alter integration tests for stdio to not use a handrolled cat implemen...
• 8ed06ef chore: fix typo (#4798)
• e6020c0 task: various small improvements to LocalKey (#4795)
• Additional commits viewable in compare view

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