Prepare release

Author: sebastianbergmann

ChangeLog.md

@@ -2,6 +2,13 @@
 
 All notable changes are documented in this file using the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+## [3.0.4] - 2023-05-07
+
+### Changed
+
+* [#118](https://github.com/sebastianbergmann/diff/pull/118): Improve performance of `MemoryEfficientLongestCommonSubsequenceCalculator`
+* [#119](https://github.com/sebastianbergmann/diff/pull/119): Improve performance of `TimeEfficientLongestCommonSubsequenceCalculator`
+
 ## [3.0.3] - 2020-11-30
 
 ### Changed
@@ -52,6 +59,7 @@ All notable changes are documented in this file using the [Keep a CHANGELOG](htt
 
 * This component is no longer supported on PHP 5.6
 
+[3.0.4]: https://github.com/sebastianbergmann/diff/compare/3.0.3...3.0.4
 [3.0.3]: https://github.com/sebastianbergmann/diff/compare/3.0.2...3.0.3
 [3.0.2]: https://github.com/sebastianbergmann/diff/compare/3.0.1...3.0.2
 [3.0.1]: https://github.com/sebastianbergmann/diff/compare/3.0.0...3.0.1