Radio buttons do not persist correctly

[burnet]

When using radio buttons and watching localstorage, as the radio buttons change the saved value eventually gets 'stuck' and doesn't change again. The incorrect value is persisted on reload.

Example using current master garlic.js

  <form action="" method="get" data-persist="garlic">
    <label><input type="radio" name="Planet" value="Earth">Earth</label>
    <label><input type="radio" name="Planet" value="Mars">Mars</label>
    <label><input type="radio" name="Planet" value="Saturn">Saturn</label>
  </form>

  <script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
  <script src="https://rawgit.com/guillaumepotier/Garlic.js/master/garlic.js"></script>

The demo on the Garlic.js website also exhibits the same issue: http://garlicjs.org/

Tested on Windows Chrome 68.0.3440.106 and Firefox 61.0.02