Update changelog for #86

Author: phil-opp

CHANGELOG.md

@@ -5,6 +5,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+- Cleanup: Use eprintln! instead of writeln! with stderr ([#86](https://github.com/rust-osdev/cargo-xbuild/pull/86))
+
 ## 0.6.0 – 2020-08-02
 
 - **Breaking:** Update cargo-xbuild to new rust directory layout ([#87](https://github.com/rust-osdev/cargo-xbuild/pull/87))