Update CHANGELOG.md

Author: photonstorm

CHANGELOG.md

@@ -155,6 +155,7 @@ If you used any of them in your code, please update to the new function names be
 
 ### Updates and API Changes
 
+* Earcut, used for polygon triangulation, has been updated from 2.1.4 to 2.2.2.
 * `Config.batchSize` has been increased from 2000 to 4096.
 * Removed the Deferred Diffuse fragment and vertex shaders from the project, as they're not used.
 * `StaticTilemapLayer.upload` will now set the vertex attributes and buffer the data, and handles internal checks more efficiently.