Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,30 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+/**
+ * The log message notification is sent from the server to the client to ask the client to log a particular message.
+ */
+class LogMessage
+{
+    /**
+     * The message type. See {@link MessageType}
+     *
+     * @var int
+     * @see MessageType
+     */
+    public $type;
+
+    /**
+     * The actual message
+     *
+     * @var string
+     */
+    public $message;
+
+    public function __construct(int $type, string $message)
+    {
+        $this->type = $type;
+        $this->message = $message;
+    }
+}