[new feature]: Item icon

[asilichenko]

Please implement such feature as item icons:

options: [
   {
      label: "Barbina",
      value: "ba",
      icon: "/img/ba.jpg"
},
.....

should be rendered as:

<div class="select-pure__option" data-value="ba"><img class="select-pure__option-icon" src="/img/ba.jpg"/>Barbina</div>

and for selected items:

<span class="select-pure__selected-label"><img class="select-pure__selected-icon" src="/img/ba.jpg">Bigoli<i class="close-btn" data-value="bg"></i></span>