adds changelog

Author: thdaraujo

CHANGELOG.md

@@ -0,0 +1,31 @@
+# Changelog
+
+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 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [1.1.0] - 2020-08-19
+
+### Added
+
+- `project_id` optional field to `order` creation
+- `metadata` optional field to `order` creation
+- `project_id` optional field to `estimate` creation
+- changelog file
+
+## [1.0.0] - 2020-07-05
+
+### Added
+
+- This is the first official release of Patch's Ruby Gem.
+
+## [1.0.0.pre] - 2020-07-02
+
+### Added
+
+- Pre-release of v1 Gem
+- Adds support for Orders, Estimates, Projects and Preferences
+