Add inital CHANGELOG.md to the project. Fixes #9

CHANGELOG.md

+# 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 the [Package Versioning Policy](https://pvp.haskell.org).
+
+## [Unreleased]
+
+## [0.68] - 2022-10-07
+
+Initial version of the changelog.

hpc-bin.cabal

@@ -10,6 +10,7 @@ Synopsis: XXX
 Description: XXX
 Category: Development
 extra-source-files: README.md
+                  , CHANGELOG.md
 build-type: Simple
 cabal-version: 2.0