Update what's new

dist/preview release/what's new.md

@@ -2,7 +2,20 @@
   - **Major updates**    
     
   - **Updates**
-    
+    - Alloc reduction: Prevent Observable.notifyObservers allocation ([benaadams](https://github.com/benaadams)) 
+    - Alloc reduction: Prevent per mesh per render closure allocation ([benaadams](https://github.com/benaadams)) 
+    - Alloc reduction: Avoid inadvertent per geometry per render alloc ([benaadams](https://github.com/benaadams)) 
+    - Alloc reduction: Avoid inadvertent per mesh per render alloc ([benaadams](https://github.com/benaadams)) 
+    - Alloc reduction: Avoid Collider root calc allocations ([benaadams](https://github.com/benaadams)) 
+    - Alloc reduction: Reduce mesh rotation allocs ([benaadams](https://github.com/benaadams)) 
+    - Alloc reduction: Allocate less in vector project and unproject ([benaadams](https://github.com/benaadams)) 
+    - GPU state change reduction: Improved uniform caching ([benaadams](https://github.com/benaadams)) 
+    - GPU state change reduction: Cache program ([benaadams](https://github.com/benaadams)) 
+    - GPU state change reduction: Cache vertexAttribPointer ([benaadams](https://github.com/benaadams)) 
+    - GPU state change reduction: Reduce buffer binds ([benaadams](https://github.com/benaadams)) 
+    - GPU state change reduction: Only bind unbound framebuffers ([benaadams](https://github.com/benaadams)) 
+    - GPU state change reduction: Cache texture changes better ([benaadams](https://github.com/benaadams)) 
+	
   - **Exporters**
     
   - **API doc**