Install psalm as dev, sync scripts updates

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

@@ -0,0 +1,31 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+/**
+ * Contains additional information about the context in which a completion request is triggered.
+ */
+class CompletionContext
+{
+    /**
+     * How the completion was triggered.
+     *
+     * @var int
+     */
+    public $triggerKind;
+
+    /**
+     * The trigger character (a single character) that has trigger code complete.
+     * Is null if `triggerKind !== CompletionTriggerKind::TRIGGER_CHARACTER`
+     *
+     * @var string|null
+     */
+    public $triggerCharacter;
+
+    public function __construct(int $triggerKind = null, string $triggerCharacter = null)
+    {
+        /** @psalm-suppress PossiblyNullPropertyAssignmentValue */
+        $this->triggerKind = $triggerKind;
+        $this->triggerCharacter = $triggerCharacter;
+    }
+}