move to standard linter for simpler configuration

docs/versions/3.0.0.md

@@ -120,7 +120,7 @@ these files). The default behavior is equivalent to this:
 ```js
 svgEditor.setConfig({
   stylesheets: [ '@default', '../svgedit-custom.css' ]
-});
+})
 ```
 
 ...which indicates that all default stylesheets will be loaded and then