Add dynamically default values by option

Hello, I modified the plugin locally to fit my needs. Instead of writing every option directly inside the HTML like this :

<select>
    <option>Option 1</option>
    <option>Option 2</option>
    <option>Option 3</option>
</select>

I added an option like that :

$('select').selectric({
    ...
    defaultOptions: ['Option 1', 'Option 2', 'Option 3']
});

To get this result:

If you guys think it could be a good idea to add this feature to Selectric, there is the code to add after the line 408:

if (typeof _this.options.defaultOptions === "object" && _this.options.defaultOptions) {
    var defaultOptions = [..._this.options.defaultOptions].map(function (value) {
        var newOption = document.createElement('option');
        newOption.innerText = value;

        return newOption;
    });

    $options = $([...$options, ...defaultOptions]);
}

It uses ES6 syntaxes so you make sure you'll support it.

Start in the code after line 408, where the issue proposes adding dynamically generated options from a defaultOptions setting. Check how Selectric currently builds its option collection and verify the behavior with a select initialized through the jQuery plugin; done means the supplied values appear as options without requiring them in the original HTML.