Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,26 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+class InitializeResultServerInfo
+{
+    /**
+     * The name of the server as defined by the server.
+     *
+     * @var string
+     */
+    public $name;
+
+    /**
+     * The server's version as defined by the server.
+     *
+     * @var string|null
+     */
+    public $version;
+
+    public function __construct(string $name, string $version = null)
+    {
+        $this->name = $name;
+        $this->version = $version;
+    }
+}