Prepare release v0.1.0 (#40)

Author: abhinav

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](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## 0.1.0 - 2021-08-19
 Starting this release, we will include pre-built binaries of gopatch for
 different systems.