Update CHANGELOG for v2.1.3

Author: razor-x

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](https://semver.org/).
 
+## [2.1.3] / 2018-09-23
+
+### Fixed
+
+- Invalid npm token on Travis.
+
 ## [2.1.2] / 2018-01-28
 
 ### Fixed
@@ -76,7 +82,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 
 - Initial release.
 
-[Unreleased]: https://github.com/rxrc/systemd-units/compare/v2.1.2...HEAD
+[Unreleased]: https://github.com/rxrc/systemd-units/compare/v2.1.3...HEAD
+[2.1.3]: https://github.com/rxrc/systemd-units/compare/v2.1.2...v2.1.3
 [2.1.2]: https://github.com/rxrc/systemd-units/compare/v2.1.1...v2.1.2
 [2.1.1]: https://github.com/rxrc/systemd-units/compare/v2.1.0...v2.1.1
 [2.1.0]: https://github.com/rxrc/systemd-units/compare/v2.0.0...v2.1.0