tracing: prepare to release 0.1.32 (tokio-rs#1978)

# 0.1.32 (March 8th, 2022)

This release reduces the overhead of creating and dropping disabled
spans significantly, which should improve performance when no `tracing`
subscriber is in use or when spans are disabled by a filter.

### Fixed

- **attributes**: Compilation failure with `--minimal-versions` due to a
  too-permissive `syn` dependency ([tokio-rs#1960])

### Changed

- Reduced `Drop` overhead for disabled spans ([tokio-rs#1974])
- `tracing-attributes`: updated to [0.1.20][attributes-0.1.20]

[tokio-rs#1974]: tokio-rs#1974
[tokio-rs#1960]: tokio-rs#1960
[attributes-0.1.20]: https://github.com/tokio-rs/tracing/releases/tag/tracing-attributes-0.1.20

tracing/CHANGELOG.md

@@ -1,3 +1,23 @@
+# 0.1.32 (March 8th, 2022)
+
+This release reduces the overhead of creating and dropping disabled
+spans significantly, which should improve performance when no `tracing`
+subscriber is in use or when spans are disabled by a filter.
+
+### Fixed
+
+- **attributes**: Compilation failure with `--minimal-versions` due to a
+  too-permissive `syn` dependency ([#1960])
+
+### Changed
+
+- Reduced `Drop` overhead for disabled spans ([#1974])
+- `tracing-attributes`: updated to [0.1.20][attributes-0.1.20]
+
+[#1974]: https://github.com/tokio-rs/tracing/pull/1974
+[#1960]: https://github.com/tokio-rs/tracing/pull/1960
+[attributes-0.1.20]: https://github.com/tokio-rs/tracing/releases/tag/tracing-attributes-0.1.20
+
 # 0.1.31 (February 17th, 2022)
 
 This release increases the minimum supported Rust version (MSRV) to 1.49.0. In

tracing/README.md

@@ -250,7 +250,7 @@ my_future
 is as long as the future's.
 
 The second, and preferred, option is through the
-[`#[instrument]`](https://docs.rs/tracing/0.1.31/tracing/attr.instrument.html)
+[`#[instrument]`](https://docs.rs/tracing/0.1.32/tracing/attr.instrument.html)
 attribute:
 
 ```rust
@@ -297,7 +297,7 @@ span.in_scope(|| {
 // Dropping the span will close it, indicating that it has ended.
 ```
 
-The [`#[instrument]`](https://docs.rs/tracing/0.1.31/tracing/attr.instrument.html) attribute macro
+The [`#[instrument]`](https://docs.rs/tracing/0.1.32/tracing/attr.instrument.html) attribute macro
 can reduce some of this boilerplate:
 
 ```rust