update minor version and changelog

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

CHANGELOG.md

@@ -4,7 +4,7 @@ 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).
 
-## [0.22.3] - unreleased
+## [0.23.0] - unreleased
 
 ### Added
 
@@ -18,6 +18,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 [PR 203]: https://github.com/prometheus/client_rust/pull/203
 
+- Update `prost` dependencies to `v0.12`.
+  See [PR 198].
+
+[PR 198]: https://github.com/prometheus/client_rust/pull/198
+
 ## [0.22.2]
 
 ### Added

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "prometheus-client"
-version = "0.22.3"
+version = "0.23.0"
 authors = ["Max Inden <[email protected]>"]
 edition = "2021"
 description = "Open Metrics client library allowing users to natively instrument applications."