Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,50 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+/**
+ * An item to transfer a text document from the client to the server.
+ */
+class TextDocumentItem
+{
+    /**
+     * The text document's URI.
+     *
+     * @var string
+     */
+    public $uri;
+
+    /**
+     * The text document's language identifier.
+     *
+     * @var string
+     */
+    public $languageId;
+
+    /**
+     * The version number of this document (it will strictly increase after each
+     * change, including undo/redo).
+     *
+     * @var int
+     */
+    public $version;
+
+    /**
+     * The content of the opened text document.
+     *
+     * @var string
+     */
+    public $text;
+
+    public function __construct(string $uri = null, string $languageId = null, int $version = null, string $text = null)
+    {
+        /** @psalm-suppress PossiblyNullPropertyAssignmentValue */
+        $this->uri = $uri;
+        /** @psalm-suppress PossiblyNullPropertyAssignmentValue */
+        $this->languageId = $languageId;
+        /** @psalm-suppress PossiblyNullPropertyAssignmentValue */
+        $this->version = $version;
+        /** @psalm-suppress PossiblyNullPropertyAssignmentValue */
+        $this->text = $text;
+    }
+}