Bump tokio from 0.1.22 to 0.2.8

[dependabot-preview]

Bumps tokio from 0.1.22 to 0.2.8.

Release notes

Sourced from tokio's releases.

Tokio v0.2.8

A breaking change was accidentally introduced in tokio-macros. The breaking change was reverted and Tokio v0.2.8 depends on the correct version of tokio-macros.

Fixes

• depend on new version of tokio-macros.

Tokio v0.2.7

This release includes both bug fixes and incremental improvements across most of Tokio. The primary bug fixes are to Runtime configured with basic_scheduler and task::LocalSet.

Fixes

• potential deadlock when dropping basic_scheduler Runtime.
• calling spawn_blocking from within a spawn_blocking (#2006).
• storing a Runtime instance in a thread-local (#2011).
• miscellaneous documentation fixes.
• rt: fix Waker::will_wake to return true when tasks match (#2045).
• test-util: time::advance runs pending tasks before changing the time (#2059).

Added

• net::lookup_host maps a T: ToSocketAddrs to a stream of SocketAddrs (#1870).
• process::Child fields are made public to match std (#2014).
• impl Stream for sync::broadcast::Receiver (#2012).
• sync::RwLock provides an asynchonous read-write lock (#1699).
• runtime::Handle::current returns the handle for the current runtime (#2040).
• StreamExt::filter filters stream values according to a predicate (#2001).
• StreamExt::filter_map simultaneously filter and map stream values (#2001).
• StreamExt::try_next convenience for streams of Result<T, E> (#2005).
• StreamExt::take limits a stream to a specified number of values (#2025).
• StreamExt::take_while limits a stream based on a predicate (#2029).
• StreamExt::all tests if every element of the stream matches a predicate (#2035).
• StreamExt::any tests if any element of the stream matches a predicate (#2034).
• task::LocalSet.await runs spawned tasks until the set is idle (#1971).
• time::DelayQueue::len returns the number entries in the queue (#1755).
• expose runtime options from the #[tokio::main] and #[tokio::test] (#2022).

Tokio v0.2.6

This release fixes an API regression introduced as part of v0.2.5.

Fixes

• fs::File::seek API regression (#1991).

Tokio v0.2.5

Includes new APIs, utilities, and fixes. Some highlights:

tokio::sync::broadcast

A multi-producer, multi-consumer channel where each sent value is sent to all consumers (fan-out). The channel is bounded and when consumers lag, they will receive an error indicating they have lagged too far behind.

use tokio::sync::broadcast;
</tr></table> ... (truncated)

Commits

• 7fb5431 macros: fix breaking changes (#2069)
• ffd4025 chore: prepare tokio-macros v0.2.2 release (#2068)
• 8bf4696 chore: prepare v0.2.7 release (#2065)
• 10398b2 docs: minor tweaks to StreamExt API docs (#2066)
• 780d6f9 docs: improve tokio::io API documentation (#2060)
• 45da5f3 rt: cleanup runtime::context (#2063)
• 855d39f Fix basic_scheduler deadlock when waking during drop (#2062)
• 798e868 task: add ways to run a LocalSet from within a rt context (#1971)
• 0193df3 rt: add a Handle::current() (#2040)
• 5930ace rt: share vtable between waker and waker ref (#2045)
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #24.