whats new

dist/preview release/what's new.md

@@ -61,6 +61,7 @@
 - Added unit tests for the glTF 2.0 loader. ([bghgary](https://github.com/bghgary)]
 - Added promise-based async functions to the SceneLoader, Scene.whenReadyAsync, and material.forceCompilationAsync. ([bghgary](https://github.com/bghgary)]
 - Added checks to VertexData.merge to ensure data is valid before merging. ([bghgary](https://github.com/bghgary)]
+- Ability to set a mesh to customize the webVR gaze tracker ([trevordev](https://github.com/trevordev))
 
 ## Bug fixes