attributes: prepare to release v0.1.21 (tokio-rs#2097)

# 0.1.21 (April 26, 2022)

This release adds support for setting explicit parent and follows-from
spans in the `#[instrument]` attribute.

### Added

- `#[instrument(follows_from = ...)]` argument for setting one or more
  follows-from span ([tokio-rs#2093])
- `#[instrument(parent = ...)]` argument for overriding the generated
  span's parent ([tokio-rs#2091])

### Fixed

- Extra braces around `async` blocks in expanded code (causes a Clippy
  warning) ([tokio-rs#2090])
- Broken documentation links ([tokio-rs#2068], [tokio-rs#2077])

Thanks to @jarrodldavis, @ben0x539, and new contributor @jswrenn for
contributing to this release!

[tokio-rs#2093]: tokio-rs#2093
[tokio-rs#2091]: tokio-rs#2091
[tokio-rs#2090]: tokio-rs#2090
[tokio-rs#2077]: tokio-rs#2077
[tokio-rs#2068]: tokio-rs#2068

tracing-attributes/CHANGELOG.md

@@ -1,3 +1,31 @@
+# 0.1.21 (April 26, 2022)
+
+This release adds support for setting explicit parent and follows-from spans
+in the `#[instrument]` attribute.
+
+### Added
+
+- `#[instrument(follows_from = ...)]` argument for setting one or more
+  follows-from span ([#2093])
+- `#[instrument(parent = ...)]` argument for overriding the generated span's
+  parent ([#2091])
+
+### Fixed
+
+- Extra braces around `async` blocks in expanded code (causes a Clippy warning)
+  ([#2090])
+- Broken documentation links ([#2068], [#2077])
+
+Thanks to @jarrodldavis, @ben0x539, and new contributor @jswrenn for
+contributing to this release!
+
+
+[#2093]: https://github.com/tokio-rs/tracing/pull/2093
+[#2091]: https://github.com/tokio-rs/tracing/pull/2091
+[#2090]: https://github.com/tokio-rs/tracing/pull/2090
+[#2077]: https://github.com/tokio-rs/tracing/pull/2077
+[#2068]: https://github.com/tokio-rs/tracing/pull/2068
+
 # 0.1.20 (March 8, 2022)
 
 ### Fixed

tracing-attributes/README.md

@@ -18,7 +18,7 @@ Macro attributes for application-level tracing.
 [crates-badge]: https://img.shields.io/crates/v/tracing-attributes.svg
 [crates-url]: https://crates.io/crates/tracing-attributes
 [docs-badge]: https://docs.rs/tracing-attributes/badge.svg
-[docs-url]: https://docs.rs/tracing-attributes/0.1.20
+[docs-url]: https://docs.rs/tracing-attributes/0.1.21
 [docs-master-badge]: https://img.shields.io/badge/docs-master-blue
 [docs-master-url]: https://tracing-rs.netlify.com/tracing_attributes
 [mit-badge]: https://img.shields.io/badge/license-MIT-blue.svg
@@ -47,7 +47,7 @@ First, add this to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-tracing-attributes = "0.1.20"
+tracing-attributes = "0.1.21"
 ```