Merge pull request #835 from transmissions11/patch-12

hevm: Normalize changelog

Author: d-xo

src/hevm/CHANGELOG.md

@@ -1,4 +1,9 @@
-# hevm changelog
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased