Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,49 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+class TextDocumentSyncClientCapabilities
+{
+
+    /**
+     * Whether text document synchronization supports dynamic registration.
+     *
+     * @var bool|null
+     */
+    public $dynamicRegistration;
+
+    /**
+     * The client supports sending will save notifications.
+     *
+     * @var bool|null
+     */
+    public $willSave;
+
+    /**
+     * The client supports sending a will save request and
+     * waits for a response providing text edits which will
+     * be applied to the document before it is saved.
+     *
+     * @var bool|null
+     */
+    public $willSaveWaitUntil;
+
+    /**
+     * The client supports did save notifications.
+     *
+     * @var bool|null
+     */
+    public $didSave;
+
+    public function __construct(
+        bool $dynamicRegistration = null,
+        bool $willSave = null,
+        bool $willSaveWaitUntil = null,
+        bool $didSave = null
+    ) {
+        $this->dynamicRegistration = $dynamicRegistration;
+        $this->willSave = $willSave;
+        $this->willSaveWaitUntil = $willSaveWaitUntil;
+        $this->didSave = $didSave;
+    }
+}