Add information about Vim's other autocmd events (#1333)

This lets you configure Vim to format your code even more frequently.

README.md

@@ -345,6 +345,21 @@ Then make Neoformat run on save:
 autocmd BufWritePre *.js Neoformat
 ```
 
+#### Other `autocmd` events
+
+You can also make Vim format your code more frequently, by setting an `autocmd` for other events. Here are a couple of useful ones:
+
+* `TextChanged`: after a change was made to the text in Normal mode
+* `InsertLeave`: when leaving Insert mode
+
+For example, you can format on both of the above events together with `BufWritePre` like this:
+
+```vim
+autocmd BufWritePre,TextChanged,InsertLeave *.js Neoformat
+```
+
+See `:help autocmd-events` in Vim for details.
+
 #### Customizing Prettier in Vim
 
 If your project requires settings other than the default Prettier settings, you can pass arguments to do so in your `.vimrc` or [vim project](http://vim.wikia.com/wiki/Project_specific_settings), you can do so: