Adding how you could access the DOM element in the new lifecycle methods

docs/v1.x-migration.md

@@ -42,6 +42,8 @@ m("div", {
 });
 ```
 
+If available the DOM-Element of the vnode can be accessed at `vnode.dom`.
+
 ## Cancelling redraw from event handlers
 
 `m.mount()` and `m.route()` still automatically redraw after a DOM event handler runs. Cancelling these redraws from within your event handlers is now done by setting the `redraw` property on the passed-in event object to `false`.