Update CHANGELOG

# Conflicts:
#	src/Map/CHANGELOG.md

Author: smnandre

src/Map/CHANGELOG.md

@@ -3,6 +3,8 @@
 ## 2.28
 
 -  Add `minZoom` and `maxZoom` options to `Map` to set the minimum and maximum zoom levels
+-  Add `Cluster` class, interface for clustering algorithm and two implementations:
+   `GridClusteringAlgorithm` and `MortonClusteringAlgorithm`.
 
 ## 2.27