refactor(forms): Use :enabled pseudo

Instead of the equivalent `:not(:disabled)`

Author: fb55

lib/api/forms.js

@@ -48,8 +48,8 @@ exports.serializeArray = function () {
     return $elem.filter(submittableSelector).toArray();
   })
     .filter(
-      // Verify elements have a name (`attr.name`) and are not disabled (`:disabled`)
-      '[name!=""]:not(:disabled)' +
+      // Verify elements have a name (`attr.name`) and are not disabled (`:enabled`)
+      '[name!=""]:enabled' +
         // and cannot be clicked (`[type=submit]`) or are used in `x-www-form-urlencoded` (`[type=file]`)
         ':not(:submit, :button, :image, :reset, :file)' +
         // and are either checked/don't have a checkable state