tasks: function (changedFiles) is getting onnly single file as changedFiles instead of array of changed files

[cdeepakait]

  nodemon({
        script:  '/server.js'
        , env: { 'NODE_ENV': 'development' }
        , ext: '*'
        , watch: [
            buildConfig.sharedFolder,
            'gulp-tasks'
        ]
        , tasks: function(changedFiles) {
            console.log('changed file is ' + changedFiles);
            return tasks
        }
        , delay: 2000
        , verbose: true
        , stdout: false
    })

Log after i change 3 files.

Loading DEVELOPMENT Configuration
info: NODE_ENV: development
info: Express server started on port 3000 at 0.0.0.0; Worker PID: 17120
DB Connection OK
[12:34:10] [nodemon] files triggering change check: backend\heml-templates\REPORT.heml
[12:34:10] [nodemon] matched rule: C:\Codebase\code\backend//*
[12:34:10] [nodemon] changes after filters (before/after): 1/1
[12:34:10] [nodemon] delaying restart for 2000ms
[12:34:10] [nodemon] files triggering change check: backend\services\email\email-sending.service.js
[12:34:10] [nodemon] matched rule: C:\Codebase\code\backend//*
[12:34:10] [nodemon] changes after filters (before/after): 1/1
[12:34:10] [nodemon] delaying restart for 2000ms
[12:34:10] [nodemon] files triggering change check: backend\middlewares\authentication.middleware.js
[12:34:10] [nodemon] matched rule: C:\Codebase\code\backend/**/*
[12:34:10] [nodemon] changes after filters (before/after): 1/1
[12:34:10] [nodemon] delaying restart for 2000ms
[12:34:12] [nodemon]
[12:34:12] [nodemon] running tasks...
changed file is c:\Codebase\code\backend\middlewares\authentication.middleware.js
[12:34:12] [nodemon] restarting due to changes...

tasks: function (changedFiles) always receives a single file instead of an array of changed files.