Bump tokio from 0.2.21 to 0.3.3

[dependabot-preview]

Bumps tokio from 0.2.21 to 0.3.3.

Release notes

Sourced from tokio's releases.

Tokio v0.3.3

Fixes a soundness hole by adding a missing Send bound to Runtime::spawn_blocking().

Fixed

• rt: include missing Send, fixing soundness hole (#3089).
• tracing: avoid huge trace span names (#3074).

Added

• net: TcpSocket::reuseport(), TcpSocket::set_reuseport() (#3083).
• net: TcpSocket::reuseaddr() (#3093).
• net: TcpSocket::local_addr() (#3093).
• net: add pid to UCred (#2633).

Tokio v0.3.2

Adds AsyncFd as a replacement for v0.2's PollEvented.

Fixed

• io: fix a potential deadlock when shutting down the I/O driver (#2903).
• sync: RwLockWriteGuard::downgrade() bug (#2957).

Added

• io: AsyncFd for receiving readiness events on raw FDs (#2903).
• net: poll_* function on UdpSocket (#2981).
• net: UdpSocket::take_error() (#3051).
• sync: oneshot::Sender::poll_closed() (#3032).

Tokio v0.3.1

This release fixes a use-after-free in the IO driver. Additionally, the read_buf and write_buf methods have been added back to the IO traits, as the bytes crate is now on track to reach version 1.0 together with Tokio.

Fixed

• net: fix use-after-free (#3019).
• fs: ensure buffered data is written on shutdown (#3009).

Added

• io: copy_buf() (#2884).
• io: AsyncReadExt::read_buf(), AsyncReadExt::write_buf() for working with Buf/BufMut (#3003).
• rt: Runtime::spawn_blocking() (#2980).
• sync: watch::Sender::is_closed() (#2991).

Tokio v0.3.0

This represents a 1.0 beta release. APIs are polished and future-proofed. APIs not included for 1.0 stabilization have been removed.

Biggest changes are:

• I/O driver internal rewrite. The windows implementation includes significant changes.

Commits

• 42de3bc chore: prepare v0.3.3 release (#3090)
• 20a2b9e rt: add missing Send bound (#3089)
• ae4e8d7 net: add get/set reuseport, reuseaddr, localaddr for TcpSocket (#3083)
• 7a18ca2 doc: add from_std change to CHANGELOG (#3075)
• 4a7b7c5 util: copy paste error in documentation for Compat (#3088)
• fede3db tracing: replace future names with spawn locations in task spans (#3074)
• 2b23aa7 util: add back public poll_read_buf() function (#3079)
• 382ee6b net: add pid to tokio::net::unix::UCred (#2633)
• 24ed874 chore: prepare tokio-util v0.5.0 release (#3078)
• 3965d91 util: update to bytes 0.6 (#3071)
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #39.