Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,36 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+class HoverClientCapabilities
+{
+
+    /**
+     * Whether hover supports dynamic registration.
+     *
+     * @var bool|null
+     */
+    public $dynamicRegistration;
+
+    /**
+     * Client supports the follow content formats if the content
+     * property refers to a `literal of type MarkupContent`.
+     * The order describes the preferred format of the client.
+     *
+     * @var string[]|null
+     * @see MarkupKind
+     */
+    public $contentFormat;
+
+    /**
+     * @param boolean|null $dynamicRegistration
+     * @param string[]|null $contentFormat
+     */
+    public function __construct(
+        bool $dynamicRegistration = null,
+        array $contentFormat = null
+    ) {
+        $this->dynamicRegistration = $dynamicRegistration;
+        $this->contentFormat = $contentFormat;
+    }
+}