Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,31 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+/**
+ * A textual edit applicable to a text document.
+ */
+class TextEdit
+{
+    /**
+     * The range of the text document to be manipulated. To insert
+     * text into a document create a range where start === end.
+     *
+     * @var Range
+     */
+    public $range;
+
+    /**
+     * The string to be inserted. For delete operations use an
+     * empty string.
+     *
+     * @var string
+     */
+    public $newText;
+
+    public function __construct(Range $range = null, string $newText = null)
+    {
+        $this->range = $range;
+        $this->newText = $newText;
+    }
+}