Bootstrap levels are int in DrupalBootLevels

[mglaman]

When using PHPStan, there is an error with the following code:

Code:

#[CLI\Bootstrap(level: DrupalBootLevels::NONE)]

Error:

Parameter $level of attribute class Drush\Attributes\Bootstrap constructor expects string, int given. 

All constants are integers. When passing a stringified zero ('0) the attribute fails. So it's documented as a string but actually wants an integer.

[weitzman]

thanks