How to reorder a HTML list with jQuery after a button click?

Question

I would like to return a list of numeric elements after clicking the "Click me!" with jQuery only.

For example, the follow values:

55.5
456.5
.54
32.2

Should be:

.54
32.2
55.5
456.5

Code:

$(function() {
  $('.btn').on('click', function() {
    $('input').keyup(function() {
      var start = $(this).index('input');
      var target = $(this).val() - 1;
      if (target < start) $(this).parent().insertBefore($('li').eq($(this).val() - 1));
      if (target > start) $(this).parent().insertAfter($('li').eq($(this).val() - 1));
    });
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<ul id="ItemList">
  <li>some number 1
    <input id="Text1" type="number" value="32.2" />
  </li>
  <li>some number 2
    <input id="Text2" type="number" value="456.5" />
  </li>
  <li>some number 3
    <input id="Text3" type="number" value="55.5" />
  </li>
  <li>some number 4
    <input id="Text4" type="number" value=".54" />
  </li>
</ul>

<button class='btn'>
      Click me!
    </button>

But, not work. I managed to get it to work, but the function only recognizes the first digit. The others she ignores.