docs: note about esModule option removal

yyx990803 · yyx990803 · commit 96635ead77d9 · 2018-03-06T15:50:11.000-05:00
diff --git a/docs/en/options.md b/docs/en/options.md
@@ -163,6 +163,8 @@ module.exports = {
 
 ### esModule
 
+> This option has been removed in v14.0. In v14.0 and above, `*.vue` files always expose ES modules.
+
 - type: `boolean`
 - default: `true` (v13.0+)
 
