Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,39 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+/**
+ * A notification to log the trace of the server’s execution.
+ * The amount and content of these notifications depends on the
+ * current trace configuration. If trace is 'off', the server
+ * should not send any logTrace notification. If trace is
+ * 'messages', the server should not add the 'verbose' field in
+ * the LogTraceParams.
+ *
+ * $/logTrace should be used for systematic trace reporting.
+ * For single debugging messages, the server should send
+ * window/logMessage notifications.
+ */
+class LogTrace
+{
+    /**
+     * The message to be logged.
+     *
+     * @var string
+     */
+    public $message;
+
+    /**
+     * Additional information that can be computed if the `trace` configuration
+     * is set to `'verbose'`
+     *
+     * @var string|null
+     */
+    public $verbose;
+
+    public function __construct(string $message, string $verbose = null)
+    {
+        $this->message = $message;
+        $this->verbose = $verbose;
+    }
+}