Update CHANGELOG.md

[ci skip]

Author: mvdnbrk

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to `dhlparcel-php-api` will be documented in this file.
 
 ## [Unreleased]
 
+## [v1.2.1] - 2020-08-08
+
 - Added support for `tightenco/collect` ^8.0 [`3b9eb55`](https://github.com/mvdnbrk/dhlparcel-php-api/commit/3b9eb55a73c2f63afdba6031656578f4b967def6)
 
 ## [v1.2.0] - 2020-08-07
@@ -138,7 +140,8 @@ All notable changes to `dhlparcel-php-api` will be documented in this file.
 
 ### Initial release
 
-[Unreleased]: https://github.com/mvdnbrk/dhlparcel-php-api/compare/v1.2.0...HEAD
+[Unreleased]: https://github.com/mvdnbrk/dhlparcel-php-api/compare/v1.2.1...HEAD
+[v1.2.1]: https://github.com/mvdnbrk/dhlparcel-php-api/compare/v1.2.0...v1.2.1
 [v1.2.0]: https://github.com/mvdnbrk/dhlparcel-php-api/compare/v1.1.1...v1.2.0
 [v1.1.1]: https://github.com/mvdnbrk/dhlparcel-php-api/compare/v1.1.0...v1.1.1
 [v1.1.0]: https://github.com/mvdnbrk/dhlparcel-php-api/compare/v1.0.1...v1.1.0