[Mime] Simplify adding Parts to an Email

Author: fabpot

Tests/Mime/TemplatedEmailTest.php

@@ -74,10 +74,16 @@ public function testSymfonySerialize()
     "htmlCharset": null,
     "attachments": [
         {
+            "filename": "test.txt",
+            "mediaType": "application",
             "body": "Some Text file",
+            "charset": null,
+            "subtype": "octet-stream",
+            "disposition": "attachment",
             "name": "test.txt",
-            "content-type": null,
-            "inline": false
+            "encoding": "base64",
+            "headers": [],
+            "class": "Symfony\\\Component\\\Mime\\\Part\\\DataPart"
         }
     ],
     "headers": {

composer.json

@@ -43,7 +43,7 @@
         "symfony/security-core": "^5.4|^6.0",
         "symfony/security-csrf": "^5.4|^6.0",
         "symfony/security-http": "^5.4|^6.0",
-        "symfony/serializer": "^5.4|^6.0",
+        "symfony/serializer": "^6.2",
         "symfony/stopwatch": "^5.4|^6.0",
         "symfony/console": "^5.4|^6.0",
         "symfony/expression-language": "^5.4|^6.0",