chore: prepare Tokio v1.12.0 (#4123)

Author: Darksonn

README.md

@@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml:
 
 ```toml
 [dependencies]
-tokio = { version = "1.11.0", features = ["full"] }
+tokio = { version = "1.12.0", features = ["full"] }
 ```
 Then, on your main.rs:
 

tokio/CHANGELOG.md

@@ -1,3 +1,47 @@
+# 1.12.0 (September 21, 2021)
+
+### Fixed
+
+- mpsc: ensure `try_reserve` error is consistent with `try_send` ([#4119])
+- mpsc: use `spin_loop_hint` instead of `yield_now` ([#4115])
+- sync: make `SendError` field public ([#4097])
+
+### Added
+
+- io: add POSIX AIO on FreeBSD ([#4054])
+- io: add convenience method `AsyncSeekExt::rewind` ([#4107])
+- runtime: add tracing span for `block_on` futures ([#4094])
+- runtime: callback when a worker parks and unparks ([#4070])
+- sync: implement `try_recv` for mpsc channels ([#4113])
+
+### Changed
+
+- macros: run runtime inside `LocalSet` when using macro ([#4027])
+
+### Documented
+
+- docs: clarify CPU-bound tasks on Tokio ([#4105])
+- mpsc: document spurious failures on `poll_recv` ([#4117])
+- mpsc: document that `PollSender` impls `Sink` ([#4110])
+- task: document non-guarantees of `yield_now` ([#4091])
+- time: document paused time details better ([#4061], [#4103])
+
+[#4027]: https://github.com/tokio-rs/tokio/pull/4027
+[#4054]: https://github.com/tokio-rs/tokio/pull/4054
+[#4061]: https://github.com/tokio-rs/tokio/pull/4061
+[#4070]: https://github.com/tokio-rs/tokio/pull/4070
+[#4091]: https://github.com/tokio-rs/tokio/pull/4091
+[#4094]: https://github.com/tokio-rs/tokio/pull/4094
+[#4097]: https://github.com/tokio-rs/tokio/pull/4097
+[#4103]: https://github.com/tokio-rs/tokio/pull/4103
+[#4105]: https://github.com/tokio-rs/tokio/pull/4105
+[#4107]: https://github.com/tokio-rs/tokio/pull/4107
+[#4110]: https://github.com/tokio-rs/tokio/pull/4110
+[#4113]: https://github.com/tokio-rs/tokio/pull/4113
+[#4115]: https://github.com/tokio-rs/tokio/pull/4115
+[#4117]: https://github.com/tokio-rs/tokio/pull/4117
+[#4119]: https://github.com/tokio-rs/tokio/pull/4119
+
 # 1.11.0 (August 31, 2021)
 
 ### Fixed

tokio/Cargo.toml

@@ -7,12 +7,12 @@ name = "tokio"
 #   - README.md
 # - Update CHANGELOG.md.
 # - Create "v1.0.x" git tag.
-version = "1.11.0"
+version = "1.12.0"
 edition = "2018"
 authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 readme = "README.md"
-documentation = "https://docs.rs/tokio/1.11.0/tokio/"
+documentation = "https://docs.rs/tokio/1.12.0/tokio/"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
 description = """

tokio/README.md

@@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml:
 
 ```toml
 [dependencies]
-tokio = { version = "1.11.0", features = ["full"] }
+tokio = { version = "1.12.0", features = ["full"] }
 ```
 Then, on your main.rs: