tracing: prepare to release v0.1.23 (tokio-rs#1223)

### Fixed

- **attributes**: Compiler error when using `#[instrument(err)]` on
  functions with mutable parameters ([tokio-rs#1167])
- **attributes**: Missing function visibility modifier when using
  `#[instrument]` with `async-trait` ([tokio-rs#977])
- **attributes** Removed unused `syn` features ([tokio-rs#928])
- **log**: Fixed an issue where the `tracing` macros would generate code
  for events whose levels are disabled statically by the `log` crate's
  `static_max_level_XXX` features ([tokio-rs#1175])
- Fixed deprecations and clippy lints ([tokio-rs#1195])
- Several documentation fixes and improvements ([tokio-rs#941], [tokio-rs#965], [tokio-rs#981],
  [tokio-rs#1146], [tokio-rs#1215])

### Changed

- **attributes**: `tracing-futures` dependency is no longer required
  when using `#[instrument]` on async functions ([tokio-rs#808])
- **attributes**: Updated `tracing-attributes` minimum dependency to
  v0.1.12 ([tokio-rs#1222])

Thanks to @nagisa, @Txuritan, @TaKO8Ki, @okready, and @krojew for
contributing to this release!

tracing/CHANGELOG.md

@@ -1,3 +1,40 @@
+# 0.1.23 (February 4, 2021)
+
+### Fixed
+
+- **attributes**: Compiler error when using `#[instrument(err)]` on functions
+  with mutable parameters ([#1167])
+- **attributes**: Missing function visibility modifier when using
+  `#[instrument]` with `async-trait` ([#977])
+- **attributes** Removed unused `syn` features ([#928])
+- **log**: Fixed an issue where the `tracing` macros would generate code for
+  events whose levels are disabled statically by the `log` crate's
+  `static_max_level_XXX` features ([#1175])
+- Fixed deprecations and clippy lints ([#1195])
+- Several documentation fixes and improvements ([#941], [#965], [#981], [#1146],
+  [#1215])
+
+### Changed
+
+- **attributes**: `tracing-futures` dependency is no longer required when using
+  `#[instrument]` on async functions ([#808])
+- **attributes**: Updated `tracing-attributes` minimum dependency to v0.1.12
+  ([#1222])
+
+Thanks to @nagisa, @Txuritan, @TaKO8Ki, @okready, and @krojew for contributing
+to this release!
+
+[#1167]: https://github.com/tokio-rs/tracing/pull/1167
+[#977]: https://github.com/tokio-rs/tracing/pull/977
+[#965]: https://github.com/tokio-rs/tracing/pull/965
+[#981]: https://github.com/tokio-rs/tracing/pull/981
+[#1215]: https://github.com/tokio-rs/tracing/pull/1215
+[#808]: https://github.com/tokio-rs/tracing/pull/808
+[#941]: https://github.com/tokio-rs/tracing/pull/941
+[#1146]: https://github.com/tokio-rs/tracing/pull/1146
+[#1175]: : https://github.com/tokio-rs/tracing/pull/1175
+[#1195]: https://github.com/tokio-rs/tracing/pull/1195
+[#1222]: https://github.com/tokio-rs/tracing/pull/1222
 # 0.1.22 (November 23, 2020)
 
 ### Changed

tracing/README.md

@@ -245,7 +245,7 @@ my_future
 is as long as the future's.
 
 The second, and preferred, option is through the
-[`#[instrument]`](https://docs.rs/tracing/0.1.22/tracing/attr.instrument.html)
+[`#[instrument]`](https://docs.rs/tracing/0.1.23/tracing/attr.instrument.html)
 attribute:
 
 ```rust
@@ -292,7 +292,7 @@ span.in_scope(|| {
 // Dropping the span will close it, indicating that it has ended.
 ```
 
-The [`#[instrument]`](https://docs.rs/tracing/0.1.22/tracing/attr.instrument.html) attribute macro
+The [`#[instrument]`](https://docs.rs/tracing/0.1.23/tracing/attr.instrument.html) attribute macro
 can reduce some of this boilerplate:
 
 ```rust