Creating theme throws error after entering destription.

[taaigo]

After entering the Description when running the php artisan theme:create dark command, it throws an error.

/o/l/h/l/rhythm-hub (main) [1]> php artisan theme:create dark

 What is theme title?:
 > dark

 What is theme description? []:
 > dark theme


   Error 

  Call to undefined function Shipu\Themevel\Console\title_case()

  at vendor/shipu/themevel/src/Console/ThemeGeneratorCommand.php:128
    124▕     {
    125▕         $this->theme['title'] = $this->ask('What is theme title?');
    126▕ 
    127▕         $this->theme['description'] = $this->ask('What is theme description?', false);
  ➜ 128▕         $this->theme['description'] = !$this->theme['description'] ? '' : title_case($this->theme['description']);
    129▕ 
    130▕         $this->theme['author'] = $this->ask('What is theme author name?', false);
    131▕         $this->theme['author'] = !$this->theme['author'] ? 'Shipu Ahamed' : title_case($this->theme['author']);
    132▕ 

      +13 vendor frames 

  14  artisan:35
      Illuminate\Foundation\Console\Kernel::handle(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

[llyynnxx]

upgrade to v3.0.4, cek composer.json