Mozartize the Gravatar lib

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

composer.json

@@ -75,6 +75,7 @@
 			"classmap_prefix": "NEXTCLOUDMAIL_",
 			"packages": [
 				"arthurhoaro/favicon",
+				"gravatarphp/gravatar",
 				"php-ai/php-ml"
 			]
 		}

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "1db4770c64c79e30b163485a10d05688",
+    "content-hash": "9d79433615022d8b2ddea57f1fffbd8b",
     "packages": [
         {
             "name": "arthurhoaro/favicon",

lib/Service/Avatar/GravatarSource.php

@@ -25,7 +25,7 @@ declare(strict_types=1);
 namespace OCA\Mail\Service\Avatar;
 
 use Exception;
-use Gravatar\Gravatar;
+use OCA\Mail\Vendor\Gravatar\Gravatar;
 use OCP\Http\Client\IClientService;
 
 class GravatarSource implements IAvatarSource {