Gulpfile.js Throws exception for wrench default implemented method of readdirSyncRecursive while calling require function of node.js

Question

i am new to Gulp and specially Gulp 4. here i have my gulpfile.js

    /**
 *  Welcome to your gulpfile!
 *  The gulp tasks are splitted in several files in the gulp directory
 *  because putting all here was really too long
 */

'use strict';

var gulp = require('gulp');
var wrench = require('wrench');

/**
 *  This will load all js or coffee files in the gulp directory
 *  in order to load all gulp tasks
 */
wrench.readdirSyncRecursive('./gulp').filter(function(file) {
  return (/\.(js|coffee)$/i).test(file);
}).map(function(file) {
  require('./gulp/' + file);
});


/**
 *  Default task clean temporaries directories and launch the
 *  main optimization build task
 */
gulp.task('default', ['clean'], function () {
  gulp.start(['build']);
});

function done() {

}

while trying to run => gulp build i am facing following Exception

AssertionError [ERR_ASSERTION]: Task function must be specified
    at Gulp.set [as _setTask] (C:\Users\ahsan\Documents\dev-work\smsvoltapp\node_modules\undertaker\lib\set-task.js:10:3)
    at Gulp.task (C:\Users\ahsan\Documents\dev-work\smsvoltapp\node_modules\undertaker\lib\task.js:13:8)
    at Object.<anonymous> (C:\Users\ahsan\Documents\dev-work\smsvoltapp\gulp\build.js:28:6)
    at Module._compile (node:internal/modules/cjs/loader:1159:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1213:10)
    at Module.load (node:internal/modules/cjs/loader:1037:32)
    at Module._load (node:internal/modules/cjs/loader:878:12)
    at Module.require (node:internal/modules/cjs/loader:1061:19)
    at require (node:internal/modules/cjs/helpers:103:18)
    at C:\Users\ahsan\Documents\dev-work\smsvoltapp\gulpfile.js:19:3 {
  generatedMessage: false,
  code: 'ERR_ASSERTION',
  actual: false,
  expected: true,
  operator: '=='
}

It seems the node.js function require at line 19:3 is not upto the mark and valid for gulp4 Gulp version: CLI version: 2.3.0 Local version: 4.0.2

npm -v => 8.19.2

Please help