function merge(obj, mqObj) {
  Object.keys(mqObj).forEach(key => {
    if (utils.isObject(obj[key]) && utils.isObject(mqObj[key])) {
      Object.assign(obj[key], mqObj[key]);
    } else {
      obj[key] = mqObj[key];
    }
  });
}
Merge media query obj into parent obj
@param {Object} obj
@param {Object} mqObj