rename selection to selectionUpdate, add editor to event listener props

docs/src/docPages/api/events.md

@@ -47,10 +47,14 @@ editor.on('update', () => {
   // The content has changed.
 }
 
-editor.on('selection', () => {
+editor.on('selectionUpdate', () => {
   // The selection has changed.
 }
 
+editor.on('viewUpdate', () => {
+  // The view has changed.
+}
+
 editor.on('transaction', ({ transaction }) => {
   // The editor state has changed.
 }