update changelog and crate version

Signed-off-by: koushiro <[email protected]>

Author: koushiro

CHANGELOG.md

@@ -4,6 +4,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.22.2]
+
+### Added
+
+- Added `Gauge<u32, AtomicU32>` implementation.
+  See [PR 191].
+
+[PR 191]: https://github.com/prometheus/client_rust/pull/191
+
 ## [0.22.1]
 
 ### Added

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "prometheus-client"
-version = "0.22.1"
+version = "0.22.2"
 authors = ["Max Inden <mail@max-inden.de>"]
 edition = "2021"
 description = "Open Metrics client library allowing users to natively instrument applications."