chore: release v0.4.21

Author: github-actions[bot]

CHANGELOG.md

@@ -6,6 +6,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0),
 
 ## Unreleased
 
+## [0.4.21](https://github.com/Nullus157/async-compression/compare/v0.4.20...v0.4.21) - 2025-03-15
+
+### Other
+
+- Update buf_writer.rs
+- Update buf_writer.rs
+- Add assertion in `produce` method to check buffer capacity in implementations for `BufWriter`
+
 ## [0.4.20](https://github.com/Nullus157/async-compression/compare/v0.4.19...v0.4.20) - 2025-02-28
 
 ### Added

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "async-compression"
-version = "0.4.20"
+version = "0.4.21"
 authors = ["Wim Looman <[email protected]>", "Allen Bui <[email protected]>"]
 edition = "2018"
 resolver = "2"