Prepare 2.1.1 release (#529)

Includes hygienic fix for `derive(Error)`.

Author: tyranron

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## master
+## 2.1.1 - 2025-12-19
 
 ### Fixed
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "derive_more"
-version = "2.1.0"
+version = "2.1.1"
 edition = "2021"
 rust-version = "1.81.0"
 description = "Adds #[derive(x)] macros for more traits"
@@ -27,7 +27,7 @@ include = [
 members = ["impl"]
 
 [dependencies]
-derive_more-impl = { version = "=2.1.0", path = "impl" }
+derive_more-impl = { version = "=2.1.1", path = "impl" }
 
 [build-dependencies]
 rustc_version = { version = "0.4", optional = true }

README.md

@@ -228,7 +228,7 @@ Changing [MSRV] (minimum supported Rust version) of this crate is treated as a *
 - However, if [MSRV] changes are concerning for your project, then use the [tilde requirement] to **pin to a specific minor version**:
   ```toml
   [dependencies]
-  derive_more = "~2.1" # or "~2.1.0"
+  derive_more = "~2.1" # or "~2.1.1"
   ```
 
 

impl/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "derive_more-impl"
-version = "2.1.0"
+version = "2.1.1"
 edition = "2021"
 rust-version = "1.81.0"
 description = "Internal implementation of `derive_more` crate"