Bump mailgun.js from 9.2.0 to 9.3.0 (#71)

Bumps [mailgun.js](https://github.com/mailgun/mailgun.js) from 9.2.0 to 9.3.0.
- [Release notes](https://github.com/mailgun/mailgun.js/releases)
- [Changelog](https://github.com/mailgun/mailgun.js/blob/master/CHANGELOG.md)
- [Commits](mailgun/mailgun.js@v9.2.0...v9.3.0)

---
updated-dependencies:
- dependency-name: mailgun.js
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Micha Preußer <[email protected]>

package.json

@@ -19,8 +19,8 @@
     "express-fileupload": "^1.4.0",
     "express-session": "^1.17.3",
     "html-to-text": "^9.0.5",
+    "mailgun.js": "^9.3.0",
     "nodemailer": "^6.9.7",
-    "mailgun.js": "^9.2.0",
     "keycloak-connect": "^22.0.5",
     "mariadb": "^3.2.0",
     "pdfkit": "^0.13.0",