docs: function merge(target, source) {
    // Check if font name is changed
    if (source['font-name']) {
      target['font-name'] = source['font-name'];
    }
  
    // Check if root dir is changed
    if (source['root-dir']) {
      target['root-dir'] = source['root-dir'];
    }
  
    // Check for icon changes
    if (source.icons) {
      for (let icon of source['icons']) {
        let index = iconsIndex.indexOf(icon.name);
  
        // Icon is replaced
        if (index !== -1) {
          target.icons[index] = icon;
        }
        // New icon is added
        else {
          target.icons.push(icon);
          iconsIndex.push(icon.name);
        }
      }
    }
  
    return target;
  }