subscriber: prepare to release v0.3.4 (tokio-rs#1800)

# 0.3.4 (Dec 23, 2021)

This release contains bugfixes for the `fmt` module, as well as documentation
improvements.

### Fixed

- **fmt**: Fixed `fmt` not emitting log lines when timestamp formatting fails
  ([tokio-rs#1689])
- **fmt**: Fixed double space before thread IDs with `Pretty` formatter
  ([tokio-rs#1778])
- Several documentation improvements ([tokio-rs#1608], [tokio-rs#1699], [tokio-rs#1701])

[tokio-rs#1689]: tokio-rs#1689
[tokio-rs#1778]: tokio-rs#1778
[tokio-rs#1608]: tokio-rs#1608
[tokio-rs#1699]: tokio-rs#1699
[tokio-rs#1701]: tokio-rs#1701

Thanks to new contributors @Swatinem and @rukai for contributing to this
release!

Author: hawkw

tracing-subscriber/CHANGELOG.md

@@ -1,3 +1,25 @@
+# 0.3.4 (Dec 23, 2021)
+
+This release contains bugfixes for the `fmt` module, as well as documentation
+improvements.
+
+### Fixed
+
+- **fmt**: Fixed `fmt` not emitting log lines when timestamp formatting fails
+  ([#1689])
+- **fmt**: Fixed double space before thread IDs with `Pretty` formatter
+  ([#1778])
+- Several documentation improvements ([#1608], [#1699], [#1701])
+
+[#1689]: https://github.com/tokio-rs/tracing/pull/1689
+[#1778]: https://github.com/tokio-rs/tracing/pull/1778
+[#1608]: https://github.com/tokio-rs/tracing/pull/1608
+[#1699]: https://github.com/tokio-rs/tracing/pull/1699
+[#1701]: https://github.com/tokio-rs/tracing/pull/1701
+
+Thanks to new contributors @Swatinem and @rukai for contributing to this
+release!
+
 # 0.3.3 (Nov 29, 2021)
 
 This release fixes a pair of regressions in `tracing-subscriber`'s `fmt` module.

tracing-subscriber/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tracing-subscriber"
-version = "0.3.3"
+version = "0.3.4"
 authors = [
     "Eliza Weisman <[email protected]>",
     "David Barsky <[email protected]>",