Partial work on feedback

src/Client/Workspace.php

@@ -56,7 +56,7 @@ class Workspace
      * the result for the first configuration item in the params).
      *
      * @param ConfigurationItem[] $items
-     * @return Promise
+     * @return Promise <mixed[]>
      */
     public function configuration(array $items): Promise
     {

src/LanguageServer.php

@@ -341,9 +341,7 @@ class LanguageServer extends AdvancedJsonRpc\Dispatcher
             // request configuration if it is supported
             // support comes with protocol version 3.6.0
             if ($this->clientCapabilities->workspace->configuration) {
-                $configurationitem = new ConfigurationItem();
-                $configurationitem->section = 'php';
-                $configuration = yield $this->client->workspace->configuration([$configurationitem]);
+                $configuration = yield $this->client->workspace->configuration([new ConfigurationItem('php')]);
                 $options = $this->mapper->map($configuration[0], new Options());
             }
 

src/Protocol/ConfigurationItem.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types = 1);
 
 namespace LanguageServer\Protocol;
 
@@ -17,4 +18,10 @@ class ConfigurationItem
      * @var string|null
      */
     public $section;
+
+    public function __construct(string $section = null, string $scopeUri = null)
+    {
+        $this->section = $section;
+        $this->scopeUri = $scopeUri;
+    }
 }

src/Server/Workspace.php

@@ -221,7 +221,7 @@ class Workspace
                     }
 
                     $this->projectIndex->wipe();
-                    $this->indexer->index()->otherwise('\\LanguageServer\\crash');
+                    yield $this->indexer->index();
                 }
             } catch (\JsonMapper_Exception $exception) {
                 $this->client->window->showMessage(