Can't install Cashier ~6.0 on Laravel 5.2
<p>I'm following the instructions via <a href="https://laravel.com/docs/5.2/billing" rel="nofollow">https://laravel.com/docs/5.2/billing</a>
to setup cashier and hopefully Stripe!</p>

<p>Here's a portion of my composer.json </p>

<pre><code>"type": "project",
    "require": {
        "php": "&gt;=5.5.9",
        "laravel/framework": "5.2.*",
        "laravel/cashier": "~6.0"
    },
    "require-dev": {
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~4.0",
        "symfony/css-selector": "2.8.*|3.0.*",
        "symfony/dom-crawler": "2.8.*|3.0.*"
    },
</code></pre>

<p>Here's my evidence that Cashier is in (via terminal)</p>

<pre><code>./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
  - Removing laravel/cashier (v6.0.0)
  - Installing laravel/cashier (v6.0.17)
    Downloading: 100%         

Writing lock file
Generating autoload files
&gt; Illuminate\Foundation\ComposerScripts::postUpdate
&gt; php artisan optimize
Generating optimized class loader
</code></pre>

<p>And here's a portion of my <code>/config/app.php</code></p>

<pre><code> Illuminate\Auth\Passwords\PasswordResetServiceProvider::class,
 Illuminate\Session\SessionServiceProvider::class,
 Illuminate\Translation\TranslationServiceProvider::class,
 Illuminate\Validation\ValidationServiceProvider::class,
 Illuminate\View\ViewServiceProvider::class,
 Laravel\Cashier\CashierServiceProvider::class,
</code></pre>

<p>and then the error</p>

<pre><code>FatalErrorException in ProviderRepository.php line 146:
Class 'Laravel\Cashier\CashierServiceProvider' not found
</code></pre>

<p>I've ran the following commands</p>

<ul>
<li><code>php artisan</code>: to see if cashier is available and it is not</li>
<li><code>composer update</code> but there's nothing to update</li>
<li><code>composer require laravel/cashier=~6.0</code> but there's nothing to update</li>
</ul>