CHANGELOG.md from pragmarb/pragma-operation

CHANGELOG.md
Summary

Maintainability

Test Coverage

Issues
# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).

## [Unreleased]

### Changed

- Switched to Zeitwerk for autoloading

## [2.2.0]

### Added

- Added `Conflict` response template

## [2.1.0]

### Added

- Added `Unauthorized` response template
- Added `ServiceUnavailable` response template
- Added `InternalServerError` response template
- Added `PaymentRequired` response template

### Fixed

- Fixed `Pragma::Operation::Error#as_json` having the wrong arity

## [2.0.0]

First Pragma 2 release.

[Unreleased]: https://github.com/pragmarb/pragma-operation/compare/v2.2.0...HEAD
[2.2.0]: https://github.com/pragmarb/pragma-operation/compare/v2.1.0...v2.2.0
[2.1.0]: https://github.com/pragmarb/pragma-operation/compare/v2.0.0...v2.1.0
[2.0.0]: https://github.com/pragmarb/pragma-operation/compare/v1.6.3...v2.0.0