Add missing mailgun-mailer package for Mailgun email driver (#452)

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": "9a54300b917f5f81b212b98cdb2dcdd0",
+    "content-hash": "55a74107ca176346bd153f73881910bb",
     "packages": [
         {
             "name": "aws/aws-crt-php",
@@ -8461,6 +8461,75 @@
             ],
             "time": "2025-04-04T09:50:51+00:00"
         },
+        {
+            "name": "symfony/mailgun-mailer",
+            "version": "v7.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/mailgun-mailer.git",
+                "reference": "8c18f2bff4e70ed5669ab8228302edd2fecd689b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/mailgun-mailer/zipball/8c18f2bff4e70ed5669ab8228302edd2fecd689b",
+                "reference": "8c18f2bff4e70ed5669ab8228302edd2fecd689b",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.2",
+                "symfony/mailer": "^7.2"
+            },
+            "conflict": {
+                "symfony/http-foundation": "<6.4"
+            },
+            "require-dev": {
+                "symfony/http-client": "^6.4|^7.0",
+                "symfony/webhook": "^6.4|^7.0"
+            },
+            "type": "symfony-mailer-bridge",
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Mailer\\Bridge\\Mailgun\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Mailgun Mailer Bridge",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/mailgun-mailer/tree/v7.3.1"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-06-20T16:15:52+00:00"
+        },
         {
             "name": "symfony/mime",
             "version": "v7.2.6",
@@ -12363,4 +12432,4 @@
     },
     "platform-dev": {},
     "plugin-api-version": "2.6.0"
-}
+}