tracing: prepare to release 0.1.30 (tokio-rs#1899)

# 0.1.30 (February 3rd, 2021)

This release adds *experimental* support for recording structured field
values using the [`valuable`] crate. See [this blog post][post] for
details on `valuable`.

Note that `valuable` support currently requires `--cfg
tracing_unstable`. See the documentation for details.

This release also adds a new `enabled!` macro for testing if a span or
event would be enabled.

### Added

- **field**: Experimental support for recording field values using the
  [`valuable`] crate ([tokio-rs#1608], [tokio-rs#1888], [tokio-rs#1887])
- `enabled!` macro for testing if a span or event is enabled ([tokio-rs#1882])

### Changed

- `tracing-core`: updated to [0.1.22][core-0.1.22]
- `tracing-attributes`: updated to [0.1.19][attributes-0.1.19]

### Fixed

- **log**: Fixed "use of moved value" compiler error when the "log"
  feature is enabled ([tokio-rs#1823])
- Fixed macro hygiene issues when used in a crate that defines its own
  `concat!` macro ([tokio-rs#1842])
- A very large number of documentation fixes and improvements.

Thanks to @@vlad-scherbina, @Skepfyr, @Swatinem, @guswynn, @teohhanhui,
@xd009642, @tobz, @d-e-s-o@0b01, and @nickelc for contributing to this
release!

[`valuable`]: https://crates.io/crates/valuable
[post]: https://tokio.rs/blog/2021-05-valuable
[core-0.1.22]: https://github.com/tokio-rs/tracing/releases/tag/tracing-core-0.1.22
[attributes-0.1.19]: https://github.com/tokio-rs/tracing/releases/tag/tracing-attributes-0.1.19
[tokio-rs#1608]: tokio-rs#1608
[tokio-rs#1888]: tokio-rs#1888
[tokio-rs#1887]: tokio-rs#1887
[tokio-rs#1882]: tokio-rs#1882
[tokio-rs#1823]: tokio-rs#1823
[tokio-rs#1842]: tokio-rs#1842

tracing/CHANGELOG.md

@@ -1,4 +1,49 @@
-# 0.1.29 (October 5th, 2021
+# 0.1.30 (February 3rd, 2021)
+
+This release adds *experimental* support for recording structured field
+values using the [`valuable`] crate. See [this blog post][post] for
+details on `valuable`.
+
+Note that `valuable` support currently requires `--cfg tracing_unstable`. See
+the documentation for details.
+
+This release also adds a new `enabled!` macro for testing if a span or event
+would be enabled.
+
+### Added
+
+- **field**: Experimental support for recording field values using the
+  [`valuable`] crate ([#1608], [#1888], [#1887])
+- `enabled!` macro for testing if a span or event is enabled ([#1882])
+
+### Changed
+
+- `tracing-core`: updated to [0.1.22][core-0.1.22]
+- `tracing-attributes`: updated to [0.1.19][attributes-0.1.19]
+
+### Fixed
+
+- **log**: Fixed "use of moved value" compiler error when the "log" feature is
+  enabled ([#1823])
+- Fixed macro hygiene issues when used in a crate that defines its own `concat!`
+  macro ([#1842])
+- A very large number of documentation fixes and improvements.
+
+Thanks to @@Vlad-Scherbina, @Skepfyr, @Swatinem, @guswynn, @teohhanhui,
+@xd009642, @tobz, @d-e-s-o@0b01, and @nickelc for contributing to this release!
+
+[`valuable`]: https://crates.io/crates/valuable
+[post]: https://tokio.rs/blog/2021-05-valuable
+[core-0.1.22]: https://github.com/tokio-rs/tracing/releases/tag/tracing-core-0.1.22
+[attributes-0.1.19]: https://github.com/tokio-rs/tracing/releases/tag/tracing-attributes-0.1.19
+[#1608]: https://github.com/tokio-rs/tracing/pull/1608
+[#1888]: https://github.com/tokio-rs/tracing/pull/1888
+[#1887]: https://github.com/tokio-rs/tracing/pull/1887
+[#1882]: https://github.com/tokio-rs/tracing/pull/1882
+[#1823]: https://github.com/tokio-rs/tracing/pull/1823
+[#1842]: https://github.com/tokio-rs/tracing/pull/1842
+
+# 0.1.29 (October 5th, 2021)
 
 This release adds support for recording `Option<T> where T: Value` as typed
 `tracing` field values. It also includes significant performance improvements

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/0.1.29/tracing/attr.instrument.html)
+[`#[instrument]`](https://docs.rs/tracing/0.1.30/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/0.1.29/tracing/attr.instrument.html) attribute macro
+The [`#[instrument]`](https://docs.rs/tracing/0.1.30/tracing/attr.instrument.html) attribute macro
 can reduce some of this boilerplate:
 
 ```rust