Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,23 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+class ExecuteCommandOptions
+{
+
+    /**
+     * The commands to be executed on the server
+     *
+     * @var string[]
+     */
+    public $commands;
+
+    /**
+     * @param string[] $commands
+     */
+    public function __construct(
+        array $commands
+    ) {
+        $this->commands = $commands;
+    }
+}