Add CHANGELOG for new versions

Author: johnkary

CHANGELOG.md

@@ -0,0 +1,17 @@
+CHANGELOG for 2.0
+=================
+
+To get the diff for a specific change, go to https://github.com/johnkary/phpunit-speedtrap/commit/XXX where XXX is the commit hash
+To get the diff between two versions, go to https://github.com/johnkary/phpunit-speedtrap/compare/v1.1.0...v2.0.0
+
+## 2.0.0 (2017-12-06)
+
+Version 2.0 introduces support for PHPUnit 6.0+, PHP 7.0+ and PSR-4 autoloading.
+
+Changes are required if you have extended SpeedTrapListener. See
+[UPGRADE.md](UPGRADE.md] for upgrading your subclass to support 2.0.
+
+* [PR #26](https://github.com/johnkary/phpunit-speedtrap/pull/26) Support PHPUnit 6.0
+* [PR #30](https://github.com/johnkary/phpunit-speedtrap/pull/30) Add PHP 7 features (includes backwards compatibility breaks, see UPGRADE.md)
+* [PR #31](https://github.com/johnkary/phpunit-speedtrap/pull/31) Support PSR-4 autoloading
+* [PR #39](https://github.com/johnkary/phpunit-speedtrap/pull/39) SpeedTrapListener extends PHPUnit BaseTestListener