atelier-testing-0.1.0.0: CHANGELOG.md

# Changelog

All notable changes to `atelier-testing` will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
and this project adheres to the [PVP](https://pvp.haskell.org/).

## [Unreleased]

### Added

- Initial release: database-backed test utilities (tmp-postgres) for the
  atelier toolkit.