Install psalm as dev, sync scripts updates

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

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+<?php
+declare(strict_types=1);
+
+namespace LanguageServerProtocol;
+
+/**
+ * A detailed structure defining expected notifications from the client of changes to text documents.
+ */
+class TextDocumentSyncOptions
+{
+    /**
+     * Open and close notifications are sent to the server.
+     * @var bool|null
+     */
+    public $openClose;
+
+    /**
+     * Change notifications are sent to the server. See TextDocumentSyncKind.None, TextDocumentSyncKind.Full
+     * and TextDocumentSyncKindIncremental.
+     * @var int|null
+     */
+    public $change;
+
+    /**
+     * Will save notifications get sent to the server.
+     * @var bool|null
+     */
+    public $willSave;
+
+    /**
+     * Will save wait until requests get sent to the server.
+     * @var bool|null
+     */
+    public $willSaveWaitUntil;
+
+    /**
+     * Save notifications are sent to the server.
+     * @var SaveOptions|null
+     */
+    public $save;
+}