title: woocommerce plus and minus button doesn't work on ajax update
body: <p>i copy paste this (global/quantity-input.php) file into my theme directory. And made this changes <br><br>`</p>
  
  <pre><code>if ( ! defined( 'ABSPATH' ) ) {
      exit; // Exit if accessed directly
  }
  ?&gt;
  &lt;div class="quantity"&gt;
    &lt;input class="minus" type="button" value="-"&gt;
    &lt;input type="number" step="&lt;?php echo esc_attr( $step ); ?&gt;" min="&lt;?php echo esc_attr( $min_value ); ?&gt;" max="&lt;?php echo esc_attr( $max_value ); ?&gt;" name="&lt;?php echo esc_attr( $input_name ); ?&gt;" value="&lt;?php echo esc_attr( $input_value ); ?&gt;" title="&lt;?php echo esc_attr_x( 'Qty', 'Product quantity input tooltip', 'woocommerce' ) ?&gt;" class="input-text qty text" size="4" /&gt;
    &lt;input class="plus" type="button" value="+"&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>also this jquery code into my js file.</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
      jQuery(document).ready(function($){
          $('.quantity').on('click', '.plus', function(e) {
              $input = $(this).prev('input.qty');
              var val = parseInt($input.val());
              $input.val( val+1 ).change();
          });
  
          $('.quantity').on('click', '.minus', 
              function(e) {
              $input = $(this).next('input.qty');
              var val = parseInt($input.val());
              if (val &gt; 0) {
                  $input.val( val-1 ).change();
              } 
          });
      });
      &lt;/script&gt;
  </code></pre>
  
  <p>it works fine but the problem is when i update any product on cart page it doesn't work anymore. is there any kind of solution? Please correct me if i did anything wrong? <br> Thanks</p>