Laravel Weblee\Mandrill\MandrillServiceProvider' class not found - laravel

Question

I am trying to "merge" Mandrill in Laravel. I always get the same error on my page. Class 'Weblee\Mandrill\MandrillServiceProvider' not found. The weird thing is that I did name the class in my config.app.
Steps that I did.
Mandrill template and stuff around
Complete .env file with the data it needs.
Included "weblee/mandrill": "dev-master" en my composer.json after laravel/framework
2 folders in vendor, weblee and Mandrill.
added provider and alias
composer update composer dump-autoload/ composer install ==> returning error Script php artisan clear-compiled handling the pre-update-cmd event returned with an error
[RuntimeException] Error Output: PHP Fatal error: Class Weblee\Mandrill\MandrillServiceProvider' not found in /var/www/vendor/laravel/framework/src/Illuminate/Foundation/ProviderRepository.php on line 146
This is my config/app.php
'providers' => [
Weblee\Mandrill\MandrillServiceProvider::class,
],
'aliases' => [
*Other aliases*
'MandrillMail' => 'Weblee\Mandrill\MandrillFacade',
],
cmposer.json
"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": ["framework", "laravel"],
"license": "MIT",
"type": "project",
"require": {
"php": ">=5.5.9",
"laravel/framework": "5.1.*",
"weblee/mandrill": "dev-master"
},
rest of code

Answer 1

Here is the way to do this
First, install weblee package using composer.json file.
Add this in your composer.json file
"require": {
"php": "^7.1.3",
"laravel/framework": "5.8.*",
"laravel/tinker": "^1.0",
"weblee/mandrill": "dev-master"
},
And after that run composer update
then add your Weblee\Mandrill\MandrillServiceProvider::class, in config\app.php
One more thing
'aliases' => [
*Other aliases*
'MandrillMail' => Weblee\Mandrill\MandrillFacade::class,
],
Don't use single quotes