chore: prepare to release 0.2.22

[hawkw]

0.2.22 (July 20, 2020)

Fixes

• docs: misc improvements (Update doc comments #2572, Add section regarding which kind of mutex to use #2658, Document that strings require the DNS feature #2663, doc: fix typo from "Rust langague" to "Rust language" #2656, fix: Update the docs of "pause" to state that time will still advance #2647, doc: fixes link for tokio::sync::oneshot::Receiver::close (close #2601) #2630, docs: Fix inconsistency in BufWriter behaviour description #2487, docs: Remove inapplicable paragraph from 'AsyncReadExt::read_ext()'. #2621,
  Channel documentation update #2624, sync: elaborate on unbounded send not being async #2600, time: add an example using interval to the time module #2623, doc: typo in select.rs #2622, docs: fix the link of contributing guide #2577, fix typo s/BufWriter/BufReader/ in io/util/buf_reader.rs #2569, Add sleep alias to delay_for #2589, docs: use intra-links in the docs #2575, docs: replace method links with intra-links #2540, Update AsyncBufRead's doc comment #2564, Added a note about into_split's drop #2567,
  stream: update StreamExt::merge doc #2520, tokio-macros: add documentation about re-naming the tokio dependency #2521, Update doc comments #2572, Clarifying that Handle::current must be called on a thread managed by tokio #2493)
• rt: allow calls to block_on inside calls to block_in_place that are
  themselves inside block_on (Allow block_on inside block_in_place inside block_on #2645)
• net: fix non-portable behavior when dropping TcpStream OwnedWriteHalf (chore: fix windows CI #2597)
• io: improve stack usage by allocating large buffers on directly on the heap
  (io: allocate large buffer directly on heap #2634)
• io: fix unsound pin projection in AsyncReadExt::read_buf and
  AsyncWriteExt::write_buf (io: fix unsound pin projection in read_buf and write_buf #2612)
• io: fix unnecessary zeroing for AsyncRead implementors (Fix unnecessary zeroing for AsyncRead implementors #2525)
• io: Fix BufReader not correctly forwarding poll_write_buf (fix: Forward poll_write_buf on BufReader #2654)
• io: fix panic in AsyncReadExt::read_line (io: fix panic in read_line #2541)

Changes

• coop: returning Poll::Pending no longer decrements the task budget (coop: Undo budget decrement on Pending #2549)

Added

• io: little-endian variants of AsyncReadExt and AsyncWriteExt methods
  (Add Little Endian variants for Read/WriteExt #1915)
• task: add tracing instrumentation to spawned tasks (task: add Tracing instrumentation to spawned tasks #2655)
• sync: allow unsized types in Mutex and RwLock (via default constructors)
  (sync: allow unsized types in Mutex and RwLock #2615)
• net: add ToSocketAddrs implementation for &[SocketAddr] (net: impl ToSocketAddrs for &[SocketAddr] #2604)
• fs: add OpenOptionsExt for OpenOptions (fs: implement unix OpenOptionsExt for OpenOptions #2515)
• fs: add DirBuilder (fs: add support for DirBuilder and DirBuilderExt #2524)

Signed-off-by: Eliza Weisman eliza@buoyant.io

[hawkw]

This is kind of a big one!

[Darksonn]

This should not be released without #2674.

[Darksonn]

You have mentioned #2572 twice here.