added diff links to changelog

Author: oscarotero

CHANGELOG.md

@@ -13,21 +13,21 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 * Upgraded phpunit to the latest version and improved its config file
 * Updated to `http-interop/http-middleware#0.5`
 
-## 0.3.0 - 2016-12-26
+## [0.3.0] - 2016-12-26
 
 ### Changed
 
 * Updated tests
 * Updated to `http-interop/http-middleware#0.4`
 * Updated `friendsofphp/php-cs-fixer#2.0`
 
-## 0.2.0 - 2016-11-22
+## [0.2.0] - 2016-11-22
 
 ### Changed
 
 * Updated to `http-interop/http-middleware#0.3`
 
-## 0.1.1 - 2016-10-01
+## [0.1.1] - 2016-10-01
 
 ### Fixed
 
@@ -36,3 +36,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ## 0.1.0 - 2016-09-30
 
 First version
+
+[0.3.0]: https://github.com/middlewares/trailing-slash/compare/v0.2.0...v0.3.0
+[0.2.0]: https://github.com/middlewares/trailing-slash/compare/v0.1.1...v0.2.0
+[0.1.1]: https://github.com/middlewares/trailing-slash/compare/v0.1.0...v0.1.1