message: Add StyleSheet.compose method to doc
diff: @@ -18,6 +18,10 @@ Flatten an array of style objects into one aggregated object, or look up the def
  Resolve one style.
  +`compose(style1, style2)`
  +
  +Combines two styles such that `style2` will override any styles in `style1`.
  +
  ## Example
  ```typescript
  