Update CHANGELOG.md

Author: cicirello

CHANGELOG.md

@@ -4,27 +4,36 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased] - 2021-02-13
+## [Unreleased] - 2021-02-15
 
 ### Added
 
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### CI/CD
+
+
+## [2.4.0] - 2021-02-15
+
 ### Changed
 * Minor optimizations to ReversalDistance and ReinsertionDistance.
 * Refactored the RandomVariates.nextCauchy methods to remove redundancy.
 * Refactored org.cicirello.math.rand.BTPE to remove redundancy.
 * Refactored various methods of RandomIndexer to remove redundancy.
 * Minor optimizations to RandomIndexer.sample methods.
 
-### Deprecated
-
-### Removed
-
 ### Fixed
 * Fixed large magnitude negative input case in MathFunctions.logGamma.
 * Fixed but in JacobiDiagonalization in case when default epsilon is not used.
 
 ### CI/CD
-* Test cases added to improve test coverage.
+* Added test cases added to improve test coverage to 100%.
 
 
 ## [2.3.0] - 2021-01-30