Add support for laravel/lumen 9

[crazedVic]

I suspect since the changes between 8 and 9 are quite subtle, an update to the composer.json might suffice?

 Problem 1
    - Root composer.json requires darkaonline/swagger-lume 8.* -> satisfiable by darkaonline/swagger-lume[8.0].
    - darkaonline/swagger-lume 8.0 requires laravel/lumen-framework ~6.0|~7.0|^8.0 -> found laravel/lumen-framework[v6.0.0, ..
., 6.x-dev, v7.0.0, ..., 7.x-dev, v8.0.0, ..., 8.x-dev] but it conflicts with your root composer.json require (^9.0.0).       
    - You can only install one version of a package, so only one of these can be installed: illuminate/macroable[v8.0.0, ..., 
8.x-dev, v9.0.0-beta.1, ..., 9.x-dev].
    - laravel/lumen-framework[v9.0.0, ..., 9.x-dev] require illuminate/macroable ^9.0 -> satisfiable by illuminate/macroable[v
9.0.0-beta.1, ..., 9.x-dev].
    - Root composer.json requires laravel/lumen-framework ^9.0.0 -> satisfiable by laravel/lumen-framework[v9.0.0, 9.x-dev].  
    - Root composer.json requires illuminate/mail 8.* -> satisfiable by illuminate/mail[v8.0.0, ..., 8.x-dev].

[MarkVaughn]

there's a pr https://github.com/DarkaOnLine/SwaggerLume/pull/112 @DarkaOnLine is this not enough?

[RafayelArzumanyan]

The PR #112 has been merged by now, so this issue should be solved. Regards,