5.3.1.x -> 5.3.2.x

First, require the crudbooster : 

$ composer require crocodicstudio/crudbooster=5.3.2.*

Then, Remove the lines bellow at config/app.php

Barryvdh\DomPDF\ServiceProvider::class,
Maatwebsite\Excel\ExcelServiceProvider::class,
Unisharp\Laravelfilemanager\LaravelFilemanagerServiceProvider::class,
Intervention\Image\ImageServiceProvider::class,
'PDF' => Barryvdh\DomPDF\Facade::class,
'Excel' => Maatwebsite\Excel\Facades\Excel::class,
'Image' => Intervention\Image\Facades\Image::class,
'CRUDBooster' => crocodicstudio\crudbooster\helpers\CRUDBooster::class,

Then run 

php artisan crudbooster:update