Bump futures-preview from 0.3.0-alpha.17 to 0.3.0-alpha.18

[dependabot-preview]

Bumps futures-preview from 0.3.0-alpha.17 to 0.3.0-alpha.18.

Release notes

Sourced from futures-preview's releases.

0.3.0-alpha.18

• Rewrote join! and try_join! as procedural macros to allow passing expressions (#1783)
• Banned manual implementation of TryFuture and TryStream for forward compatibility. See #1776 for more details. (#1777)
• Changed AsyncReadExt::read_to_end to return the total number of bytes read (#1721)
• Changed ArcWake::into_waker to a free function waker (#1676)
• Supported trailing commas in macros (#1733)
• Removed futures-channel dependency from futures-executor (#1735)
• Supported channel::oneshot in no_std environment (#1749)
• Added Future bounds to FusedFuture (#1779)
• Added Stream bounds to FusedStream (#1779)
• Changed StreamExt::boxed to return BoxStream (#1780)
• Added StreamExt::boxed_local (#1780)
• Added AsyncReadExt::read_to_string (#1721)
• Implemented AsyncWrite for IntoAsyncRead (#1734)
• Added get_ref, get_mut and into_inner methods to Compat01As03 and Compat01As03Sink (#1705)
• Added ThreadPool::{spawn_ok, spawn_obj_ok} (#1750)
• Added TryStreamExt::try_flatten (#1731)
• Added FutureExt::now_or_never (#1747)

Changelog

Sourced from futures-preview's changelog.

0.3.0-alpha.18 - 2019-8-9

• Rewrote join! and try_join! as procedural macros to allow passing expressions (#1783)
• Banned manual implementation of TryFuture and TryStream for forward compatibility. See #1776 for more details. (#1777)
• Changed AsyncReadExt::read_to_end to return the total number of bytes read (#1721)
• Changed ArcWake::into_waker to a free function waker (#1676)
• Supported trailing commas in macros (#1733)
• Removed futures-channel dependency from futures-executor (#1735)
• Supported channel::oneshot in no_std environment (#1749)
• Added Future bounds to FusedFuture (#1779)
• Added Stream bounds to FusedStream (#1779)
• Changed StreamExt::boxed to return BoxStream (#1780)
• Added StreamExt::boxed_local (#1780)
• Added AsyncReadExt::read_to_string (#1721)
• Implemented AsyncWrite for IntoAsyncRead (#1734)
• Added get_ref, get_mut and into_inner methods to Compat01As03 and Compat01As03Sink (#1705)
• Added ThreadPool::{spawn_ok, spawn_obj_ok} (#1750)
• Added TryStreamExt::try_flatten (#1731)
• Added FutureExt::now_or_never (#1747)

Commits

• 66c879e Fix changelog release date for 0.3.0-alpha.18
• 569e4c6 State 0.3.0-alpha.18
• fe54db5 Update changelog for next release
• 8e55a0f Elide lifetimes in Pin\<&mut Self>
• 049922d Rewrite join! and try_join! as procedural macros
• d5816f5 Re-add some disabled tests
• e91a3f1 ci: Use the latest toolchain with clippy available if clippy is unavailable o...
• 22e2942 Add Future/Stream bounds to FusedFuture/FusedStream
• ab7743d Change StreamExt::boxed to return BoxStream and add StreamExt::boxed_local
• 8b72bc9 Ban manual implementation of TryFuture and TryStream
• Additional commits viewable in compare view

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