Update readme

README.md

@@ -5,6 +5,13 @@ A dumb autopairs plugin for Neovim that tries not to get in your way.
 It handles inserting closing braces/quotes, `<CR>` and `<BS>`.
 It does not attempt to wrap existing text.
 
+`<CR>` works best with these settings:
+
+```lua
+vim.o.autoindent = true
+vim.cmd("filetype plugin indent on")
+```
+
 ## Installation
 
 Using your favourite package manager: