Bump tokio from 0.2.25 to 1.1.0

[dependabot]

Bumps tokio from 0.2.25 to 1.1.0.

Release notes

Sourced from tokio's releases.

Tokio v1.1.0

Added

• net: add try_read_buf and try_recv_buf (#3351)
• mpsc: Add Sender::try_reserve function (#3418)
• sync: add RwLock try_read and try_write methods (#3400)
• io: add ReadBuf::inner_mut (#3443)

Changed

• macros: improve select! error message (#3352)
• io: keep track of initialized bytes in read_to_end (#3426)
• runtime: consolidate errors for context missing (#3441)

Fixed

• task: wake LocalSet on spawn_local (#3369)
• sync: fix panic in broadcast::Receiver drop (#3434)

Documented

• stream: link to new Stream wrappers in tokio-stream (#3343)
• docs: mention that test-util feature is not enabled with full (#3397)
• process: add documentation to process::Child fields (#3437)
• io: clarify AsyncFd docs about changes of the inner fd (#3430)
• net: update datagram docs on splitting (#3448)
• time: document that Sleep is not Unpin (#3457)
• sync: add link to PollSemaphore (#3456)
• task: add LocalSet example (#3438)
• sync: improve bounded mpsc documentation (#3458)

Tokio v1.0.3

Fixed

• io: memory leak during shutdown (#3477).

Tokio v1.0.2

Fixed

• io: soundness in read_to_end (#3428).

Tokio v1.0.1

This release fixes a soundness hole caused by the combination of RwLockWriteGuard::map and RwLockWriteGuard::downgrade by removing the map function. This is a breaking change, but breaking changes are allowed under our semver policy when they are required to fix a soundness hole. (See [this RFC][semver] for more.)

Note that we have chosen not to do a deprecation cycle or similar because Tokio 1.0.0 was released two days ago, and therefore the impact should be minimal.

Due to the soundness hole, we have also yanked Tokio version 1.0.0.

Removed

• sync: remove RwLockWriteGuard::map and RwLockWriteGuard::try_map (#3345)

Fixed

... (truncated)

Commits

• 35b1a4d chore: prepare Tokio 1.1.0 (#3462)
• 6da5087 sync: improve bounded mpsc documentation (#3458)
• c6f0812 task: add LocalSet example (#3438)
• 29bd5fa sync: add link to PollSemaphore (#3456)
• f2a048d time: document that Sleep is not Unpin (#3457)
• 198363f chore: prepare tokio-util 0.6.2 (#3453)
• 5b7c7d5 io: use a sealed trait to constrain VecWithInitialized (#3450)
• 117fc2e tests: fix ping pong saturation (#3390)
• c4f66ed util: fix panics on updating DelayQueue entries (#3270)
• 7d5b12c sync: fix panic in broadcast::Receiver drop (#3434)
• Additional commits viewable in compare view

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