chore: prepare Tokio v1.14.0 (#4234)

# 1.14.0 (November 15, 2021)

### Fixed

- macros: fix compiler errors when using `mut` patterns in `select!`
  ([#4211])
- sync: fix a data race between `oneshot::Sender::send` and awaiting a
  `oneshot::Receiver` when the oneshot has been closed ([#4226])
- sync: make `AtomicWaker` panic safe ([#3689])
- runtime: fix basic scheduler dropping tasks outside a runtime context
  ([#4213])

### Added

- stats: add `RuntimeStats::busy_duration_total` ([#4179], [#4223])

### Changed

- io: updated `copy` buffer size to match `std::io::copy` ([#4209])

### Documented

- io: rename buffer to file in doc-test ([#4230])
- sync: fix Notify example ([#4212])

[#4211]: https://github.com/tokio-rs/tokio/pull/4211
[#4226]: https://github.com/tokio-rs/tokio/pull/4226
[#3689]: https://github.com/tokio-rs/tokio/pull/3689
[#4213]: https://github.com/tokio-rs/tokio/pull/4213
[#4179]: https://github.com/tokio-rs/tokio/pull/4179
[#4223]: https://github.com/tokio-rs/tokio/pull/4223
[#4209]: https://github.com/tokio-rs/tokio/pull/4209
[#4230]: https://github.com/tokio-rs/tokio/pull/4230
[#4212]: https://github.com/tokio-rs/tokio/pull/4212

README.md

@@ -56,7 +56,7 @@ Make sure you activated the full features of the tokio crate on Cargo.toml:
 
 ```toml
 [dependencies]
-tokio = { version = "1.13.1", features = ["full"] }
+tokio = { version = "1.14.0", features = ["full"] }
 ```
 Then, on your main.rs: