Bump version number and update changelog

Author: andreacorbellini

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+## atomic-write-file 0.3.0
+
+### Unix changes
+
+* Updated dependency on `nix` to version 0.30.
+
+### Breaking changes
+
+* Changed Rust edition from 2021 to 2024.
+
+* Explicitly set the MSRV to 0.85 (the first Rust version to support the 2024
+  edition).
+
 ## atomic-write-file 0.2.3
 
 * Fixed documentation to state that `discard()` (not `commit()`) is called on

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "atomic-write-file"
-version = "0.2.3"
+version = "0.3.0"
 authors = ["Andrea Corbellini <[email protected]>"]
 edition = "2024"
 rust-version = "1.85"