Added Changelog

CHANGELOG.md

@@ -0,0 +1,25 @@
+# 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]
+
+## [0.2.0] - 2021-02-12
+### Added
+- Format Document and Format Document Selection support.
+- Action to add ignore comment for problem to a line.
+
+### Changed
+- Refactored the DocumentTracker and WorkspaceTracker into separate services and providers to increase performance.
+
+### Fixed
+- Fix unresolved promises caused by unhandled errors in workers.
+
+## [0.1.0] - 2021-02-09
+### Added
+- Custom PHPCS reports for diagnostic and code action resolution.
+- Worker and WorkerPool for processing asynchronous requests to PHPCS.
+- WorkspaceTracker for listening to document and configuration events.
+- DocumentTracker for providing diagnostic and code action data to VS Code.