Tree output with filtering

          
            1const tree = convertObject(data, {2  outputFormat: 'tree',3  filterFn: (val, key) => typeof val === 'string'4});6console.log(tree);7// [8//   { key: 'user', children: [{ key: 'name', value: 'Alice' }] },9//   { key: 'settings', children: [{ key: 'theme', value: 'dark' }] }10// ]