composer: bump phpmailer/phpmailer from 6.12.0 to 7.0.2 in /app/full

Bumps [phpmailer/phpmailer](https://github.com/PHPMailer/PHPMailer) from 6.12.0 to 7.0.2.
- [Release notes](https://github.com/PHPMailer/PHPMailer/releases)
- [Changelog](https://github.com/PHPMailer/PHPMailer/blob/master/changelog.md)
- [Commits](PHPMailer/PHPMailer@v6.12.0...v7.0.2)

---
updated-dependencies:
- dependency-name: phpmailer/phpmailer
  dependency-version: 7.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

app/full/composer.json

@@ -23,7 +23,7 @@
         "sebastianfeldmann/ftp": "^0.9.2",
         "kunalvarma05/dropbox-php-sdk": "^0.5",
         "guzzlehttp/guzzle": "^7.5",
-        "phpmailer/phpmailer": "^6.0",
+        "phpmailer/phpmailer": "^7.0",
         "vlucas/phpdotenv": "^5.0"
     },
     "config": {