Changelog.md added

Author: erickskrauch

CHANGELOG.md

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+# 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]
+
+## [0.2.0] - 2018-08-08
+### Added
+- Enh #4: `Ely\remove_class_name_method_usages` fixer.
+- `array_syntax` fixer.
+- This changelog file.
+- Travis CI building.
+
+### Changed
+- `friendsofphp/php-cs-fixer` version bumped to `^2.12.2`.
+- `phpunit/phpunit` downgraded to `^6.5.1` to be compatible with PHP 7.0.
+
+### Fixed
+- Bug #5: `Ely/line_break_after_statements` triggers error if statement doesn't have control brackets.
+
+## 0.1.0 - 2018-04-17
+### Added
+- First release
+
+[Unreleased]: https://github.com/olivierlacan/keep-a-changelog/compare/0.2.0...HEAD
+[0.2.0]: https://github.com/elyby/php-code-style/compare/0.1.0...0.2.0