Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,21 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+/**
+ * Code Lens options.
+ */
+class CodeLensOptions
+{
+    /**
+     * Code lens has a resolve provider as well.
+     *
+     * @var bool|null
+     */
+    public $resolveProvider;
+
+    public function __construct(bool $resolveProvider = null)
+    {
+        $this->resolveProvider = $resolveProvider;
+    }
+}