安装webman报错

composer create-project workerman/webman:~2.0

Script support\Setup::run handling the post-create-project-cmd event terminated with an exception

  [Symfony\Component\Console\Exception\InvalidArgumentException]                                         
  Invalid foreground color specified: "bright-blue". Expected one of (black, red, green, yellow, blue,   
  magenta, cyan, white, default)