Updated CHANGELOG

Author: sverhoeven

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 * Directory structure ([#67](https://github.com/NLESC-JCER/cpp2wasm/issues/67))
+* Makefile does less entangles ([#61](https://github.com/NLESC-JCER/cpp2wasm/issues/61))
 
 ## [0.3.0] -  2020-06-09