update changelog

- add 1.5.0 release
- add master

Author: alcohol

CHANGELOG.md

@@ -3,6 +3,14 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [master]
+
+  * ...
+
+## [1.5.0] 2018-11-01
+
+  * Changed: updated licenses list (SPDX 3.3)
+
 ## [1.4.0] 2018-05-04
 
   * Changed: updated licenses list (SPDX 3.1)
@@ -61,6 +69,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
     - Classname: `Updater` -> `SpdxLicensesUpdater`
   * Changed: validation via regex implementation instead of lexer.
 
+[master]: https://github.com/composer/spdx-licenses/compare/1.5.0...master
+[1.5.0]: https://github.com/composer/spdx-licenses/compare/1.4.0...1.5.0
+[1.4.0]: https://github.com/composer/spdx-licenses/compare/1.3.0...1.4.0
 [1.3.0]: https://github.com/composer/spdx-licenses/compare/1.2.0...1.3.0
 [1.2.0]: https://github.com/composer/spdx-licenses/compare/1.1.6...1.2.0
 [1.1.6]: https://github.com/composer/spdx-licenses/compare/1.1.5...1.1.6