Ticks with Range Slider do not snap

[bigevilbrain]

https://codepen.io/anon/pen/XgPqdJ

Ticks function correctly when range is false or value is singular.

<input id="slider1" type="text"
    data-slider-min="0.0"
    data-slider-max="400.0"
    data-slider-ticks="[0, 100, 200, 300, 400]"
    data-slider-ticks-snap-bounds="30"
    data-slider-range="false"
/>

Slider does not snap to ticks when range is true or value is an array.

<input id="slider2" type="text"
    data-slider-min="0.0"
    data-slider-max="400.0"
    data-slider-ticks="[0, 100, 200, 300, 400]"
    data-slider-ticks-snap-bounds="30"
    data-slider-range="true"
/>

[seiyria]

You're welcome to submit a PR.