Add twitter adapter to prevent errors on 429 status code

src/Adapters/Twitter.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Embed\Adapters;
+
+use Embed\Http\Response;
+
+/**
+ * Adapter to provide information from twitter.
+ * Required when twitter returns a 429 status code.
+ */
+class Twitter extends Webpage
+{
+    /**
+     * {@inheritdoc}
+     */
+    public static function check(Response $response)
+    {
+        return $response->isValid([200, 429]) && $response->getUrl()->match([
+            '*twitter.*',
+        ]);
+    }
+}