chore: prepare Tokio v1.19.0

[Darksonn]

1.19.0 (June 3, 2022)

Added

• runtime: add is_finished method for JoinHandle and AbortHandle (#4709)
• runtime: make global queue and event polling intervals configurable (#4671)
• sync: add Notified::enable (#4705)
• sync: add watch::Sender::send_if_modified (#4591)
• sync: add resubscribe method to broadcast::Receiver (#4607)

Changed

• io: refactor out usage of Weak in the io handle (#4656)

Fixed

• macros: avoid starvation in join! and try_join! (#4624)

Documented

• runtime: clarify semantics of tasks outliving block_on (#4729)
• time: fix example for MissedTickBehavior::Burst (#4713)

Unstable

• metrics: correctly update atomics in IoDriverMetrics (#4725)
• metrics: fix compilation with unstable, process, and rt, but without net (#4682)
• task: add #[track_caller] to JoinSet/JoinMap (#4697)
• task: add Builder::{spawn_on, spawn_local_on, spawn_blocking_on} (#4683)
• task: add consume_budget for cooperative scheduling (#4498)
• task: add join_set::Builder for configuring JoinSet tasks (#4687)
• task: update return value of JoinSet::join_one (#4726)