fix: fix error forcing blank config

The configure option returns void, this causes the application to overwrite the users own configuration. You would only notice when you start getting errors. The `app()->getConfigurationPath()` is more appropriate as it returns a string that can be validated against the conditional on line 59.

Author: prog-24

src/GetStream/StreamLaravel/StreamLumenServiceProvider.php

@@ -52,7 +52,7 @@ public function register()
      */
     protected function registerResources()
     {
-        $userConfigFile = app()->configure('stream-laravel.php');
+        $userConfigFile = app()->getConfigurationPath('stream-laravel.php');
         $packageConfigFile = __DIR__.'/../../config/config.php';
         $config = $this->app['files']->getRequire($packageConfigFile);