Release notes for 0.3.13 release

RELEASES.md

@@ -1,5 +1,16 @@
 # Release Notes
 
+## 0.3.13
+
+### Fixes
+
+- Reserve space for padding/borders in nodes with measure functions (#497)
+  **NOTE: This has the potential to break layouts relying on the old behaviour.** However, such layouts would be relying on a style having no effect, so it is judged that such layouts are unlikely to exist in the wild. If this turns out not to be true then this fix will be reverted on the 0.3.x branch.
+- Fix rounding accumulation bug (#521) (Fixes #501 and bevyengine/bevy#8911)
+- Flexbox: pass correct cross-axis available space when computing an item's intrinsic main size (#522)(Fixes bevyengine/bevy#9350)
+- Flexbox: Subtract child margin not parent margin when computing stretch-alignment known size
+- Apply margins to leaf nodes when computing available space for measure functions
+
 ## 0.3.12
 
 ### Fixes