mockcat-0.5.3.0: CHANGELOG.md

# Changelog for `mockcat`

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
[Haskell Package Versioning Policy](https://pvp.haskell.org/).

## Unreleased

## 0.5.3.0
- Add: MockT now implements MonadUnliftIO