Do not show v-tooltip for touch devices

use-v-tooltip.vue

function isTouchDevice() {
    const prefixes = ' -webkit- -moz- -o- -ms- '.split(' ');
    const mq = function(query) {
        return window.matchMedia(query).matches;
    };
    if (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch) {
        return true;
    }
    // include the 'heartz' as a way to have a non matching MQ to help terminate the join
    // https://git.io/vznFH
    const query = ['(', prefixes.join('touch-enabled),('), 'heartz', ')'].join('');
    return mq(query);
}

VTooltip.enabled = !isTouchDevice();