Making timeout configurable.

src/SolrServiceProvider.php

@@ -18,6 +18,9 @@ class SolrServiceProvider extends ServiceProvider
     {
         $this->app->singleton(Client::class, function () {
             $adapter = new \Solarium\Core\Client\Adapter\Curl();
+            if (config('solr.endpoint.localhost.timeout')) {
+                $adapter->setTimeout(config('solr.endpoint.localhost.timeout'));
+            }
             $eventDispatcher = new \Symfony\Component\EventDispatcher\EventDispatcher();
             return new Client($adapter, $eventDispatcher, config('solr'));
         });