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.

Makefile

@@ -13,3 +13,9 @@ go-mod-tidy:
 format:
 	go fmt $(go list ./... | grep -v /vendor/)
 	go vet $(go list ./... | grep -v /vendor/)
+
+build/snapshot:
+	./tools/goreleaser_linux_amd64 --snapshot --rm-dist --skip-publish
+
+build/release:
+	./tools/goreleaser_linux_amd64 --rm-dist --skip-publish