Bump tokio from 1.12.0 to 1.13.1 in /rust/echo

[dependabot[bot]]

Bumps tokio from 1.12.0 to 1.13.1.

Release notes

Sourced from tokio's releases.

Tokio v1.13.1

1.13.1 (November 15, 2021)

This release fixes a data race when sending and receiving on a closed oneshot channel (RUSTSEC-2021-0124).

Fixed

• sync: fix a data race between oneshot::Sender::send and awaiting a oneshot::Receiver when the oneshot has been closed (#4226)

Tokio v1.13.0

1.13.0 (October 29, 2021)

Fixed

• sync: fix Notify to clone the waker before locking its waiter list (#4129)
• tokio: add riscv32 to non atomic64 architectures (#4185)

Added

• net: add poll_{recv,send}_ready methods to udp and uds_datagram (#4131)
• net: add try_*, readable, writable, ready, and peer_addr methods to split halves (#4120)
• sync: add blocking_lock to Mutex (#4130)
• sync: add watch::Sender::send_replace (#3962, #4195)
• sync: expand Debug for Mutex<T> impl to unsized T (#4134)
• tracing: instrument time::Sleep (#4072)
• tracing: use structured location fields for spawned tasks (#4128)

Changed

• io: add assert in copy_bidirectional that poll_write is sensible (#4125)
• macros: use qualified syntax when polling in select! (#4192)
• runtime: handle block_on wakeups better (#4157)
• task: allocate callback on heap immediately in debug mode (#4203)
• tokio: assert platform-minimum requirements at build time (#3797)

Documented

• docs: conversion of doc comments to indicative mood (#4174)
• docs: add returning on the first error example for try_join! (#4133)
• docs: fixing broken links in tokio/src/lib.rs (#4132)
• signal: add example with background listener (#4171)
• sync: add more oneshot examples (#4153)
• time: document Interval::tick cancel safety (#4152)

#3797: tokio-rs/tokio#3797 #3962: tokio-rs/tokio#3962

... (truncated)

Commits

• 2a3c803 chore: prepare Tokio v1.13.1 (#4235)
• 7d8de50 oneshot: document UnsafeCell invariants (#4229)
• ab0e60d sync: fix racy UnsafeCell access on a closed oneshot (#4226)
• ac89d89 chore: prepare Tokio v1.13.0 (#4196)
• e184205 chore: prepare tokio-macros 1.6.0 (#4197)
• 44a1aad task: allocate callback on heap immediately in debug mode (#4203)
• 75c0777 sync: make watch::send_replace infallible (#4195)
• 268ed5e task: add more tips + links to spawn_blocking docs (#4150)
• 0c68b89 codec: update stream impl for Framed to return None after Err (#4166)
• 827694a ci: fix nightly version for cirrus ci (#4200)
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