build: add goreleaser to build tool (#6)

Add the `goreleaser` tool to the repository to handle building and
publishing the application. Add a simple configuration file to build the
application for all major OS versions.
Update the Makefile to include commands to build release and snapshot
versions of the tool.
Add a placeholder CHANGELOG file to be included in the package files.

CHANGELOG.md

@@ -0,0 +1,10 @@
+# CHANGELOG
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog], and this project adheres to [Semantic Versioning].
+
+## [Unreleased]
+
+[Keep a Changelog]: https://keepachangelog.com/en/1.0.0/
+[Semantic Versioning]: https://semver.org/spec/v2.0.0.html