subscriber: prepare to release 0.2.24 (tokio-rs#1582)

# 0.2.24 (September 19, 2021)

This release contains a number of bug fixes, including a fix for
`tracing-subscriber` failing to compile on the minimum supported Rust
version of 1.42.0. It also adds `IntoIterator` implementations for the
`Targets` type.

### Fixed

- Fixed compilation on Rust 1.42.0 ([tokio-rs#1580], [tokio-rs#1581])
- **registry**: Ensure per-layer filter `enabled` state is cleared when
  a global filter short-circuits filter evaluation ([tokio-rs#1575])
- **layer**: Fixed `Layer::on_layer` not being called for `Box`ed
  `Layer`s, which broke  per-layer filtering ([tokio-rs#1576])

### Added

- **filter**: Added `Targets::iter`, returning an iterator over the set
  of target-level pairs enabled by a `Targets` filter ([tokio-rs#1574])
- **filter**:  Added `IntoIterator` implementations for `Targets` and
  `&Targets` ([tokio-rs#1574])

Thanks to new contributor @connec for contributing to this release!

[tokio-rs#1580]: tokio-rs#1580
[tokio-rs#1581]: tokio-rs#1581
[tokio-rs#1575]: tokio-rs#1575
[tokio-rs#1576]: tokio-rs#1576
[tokio-rs#1574]: tokio-rs#1574

tracing-subscriber/CHANGELOG.md

@@ -1,3 +1,32 @@
+# 0.2.24 (September 19, 2021)
+
+This release contains a number of bug fixes, including a fix for
+`tracing-subscriber` failing to compile on the minimum supported Rust version of
+1.42.0. It also adds `IntoIterator` implementations for the `Targets` type.
+
+### Fixed
+
+- Fixed compilation on Rust 1.42.0 ([#1580], [#1581])
+- **registry**: Ensure per-layer filter `enabled` state is cleared when a global
+  filter short-circuits filter evaluation ([#1575])
+- **layer**: Fixed `Layer::on_layer` not being called for `Box`ed `Layer`s,
+  which broke  per-layer filtering ([#1576])
+
+### Added
+
+- **filter**: Added `Targets::iter`, returning an iterator over the set of
+  target-level pairs enabled by a `Targets` filter ([#1574])
+- **filter**:  Added `IntoIterator` implementations for `Targets` and `&Targets`
+  ([#1574])
+
+Thanks to new contributor @connec for contributing to this release!
+
+[#1580]: https://github.com/tokio-rs/tracing/pull/1580
+[#1581]: https://github.com/tokio-rs/tracing/pull/1581
+[#1575]: https://github.com/tokio-rs/tracing/pull/1575
+[#1576]: https://github.com/tokio-rs/tracing/pull/1576
+[#1574]: https://github.com/tokio-rs/tracing/pull/1574
+
 # 0.2.23 (September 16, 2021)
 
 This release fixes a few bugs in the per-layer filtering API added in v0.2.21.