Install psalm as dev, sync scripts updates

vendor/felixfbecker/language-server-protocol/src/CompletionItemLabelDetails.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+/**
+ * Additional details for a completion item label.
+ *
+ * @since 3.17.0 - proposed state
+ */
+class CompletionItemLabelDetails
+{
+    /**
+     * An optional string which is rendered less prominently directly after
+     * {@link CompletionItem.label label}, without any spacing. Should be
+     * used for function signatures or type annotations.
+     *
+     * @var string|null
+     */
+    public $detail;
+
+    /**
+     * An optional string which is rendered less prominently after
+     * {@link CompletionItemLabelDetails.detail}. Should be used for fully qualified
+     * names or file path.
+     *
+     * @var string|null
+     */
+    public $description;
+
+    public function __construct(string $detail = null, string $description = null)
+    {
+        $this->detail = $detail;
+        $this->description = $description;
+    }
+}