Add fields and markup added in schema 0.0.33

- Recipient::$postId: the commented post, set for comments
- ContactAttachmentPayload::$hash: hash of the VCF info
- ChatPatch: document the description field (up to 16000 chars,
  empty string removes it)
- QuoteMarkup and MarkupType::Quote. createMarkupElement() threw
  "Unknown or unsupported markup type" on a quote block, so a message
  with a quote could not be parsed at all

New constructor parameters are optional and last, so existing
positional calls keep working; toArray() of these models now also
carries the new keys.

tests/Models/MessageTest.php

@@ -32,6 +32,7 @@ final class MessageTest extends TestCase
                 'chat_type' => 'dialog',
                 'user_id' => 123,
                 'chat_id' => null,
+                'post_id' => null,
             ],
             'body' => [
                 'mid' => 'mid.456.xyz',