Bump futures from 0.3.12 to 0.3.13

Created by: dependabot[bot]

Bumps futures from 0.3.12 to 0.3.13.

Release notes

Sourced from futures's releases.

0.3.13

• Mitigated starvation issues in FuturesUnordered (#2333)
• Fixed race with dropping mpsc::Receiver (#2304)
• Added Shared::{strong_count, weak_count} (#2346)
• Added no_std support for task::noop_waker_ref (#2332)
• Implemented Stream::size_hint for Either (#2325)

Changelog

Sourced from futures's changelog.

0.3.13 - 2021-02-23

• Mitigated starvation issues in FuturesUnordered (#2333)
• Fixed race with dropping mpsc::Receiver (#2304)
• Added Shared::{strong_count, weak_count} (#2346)
• Added no_std support for task::noop_waker_ref (#2332)
• Implemented Stream::size_hint for Either (#2325)

Commits

• c91f869 Release 0.3.13 (#2350)
• c29a73a Document poll!(stream.next()) pattern for poll!(..) (#2357)
• df6353e Fix some typos in doc-comments (#2354)
• 18e46e8 tests: cfg-ignore compat tests if there is no compat feature (#2353)
• f86bb46 Add CODEOWNERS (#2351)
• e981716 Fix clippy::manual_flatten warning (#2347)
• f273d3b FuturesUnordered: Do not poll the same future twice per iteration (#2333)
• 4959ecc Add strong/weak pointer counts to Shared (#2346)
• 6acaa81 small change in select example. (#2345)
• 59f62b0 Disable rustfmt (#2339)
• Additional commits viewable in compare view

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