refactor: bump mailgun.js from 12.7.0 to 12.7.1

Bumps [mailgun.js](https://github.com/mailgun/mailgun.js) from 12.7.0 to 12.7.1.
- [Release notes](https://github.com/mailgun/mailgun.js/releases)
- [Changelog](https://github.com/mailgun/mailgun.js/blob/master/CHANGELOG.md)
- [Commits](mailgun/mailgun.js@v12.7.0...v12.7.1)

---
updated-dependencies:
- dependency-name: mailgun.js
  dependency-version: 12.7.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -50,7 +50,7 @@
     "jasmine": "6.1.0",
     "jasmine-spec-reporter": "7.0.0",
     "madge": "5.0.1",
-    "mailgun.js": "12.7.0",
+    "mailgun.js": "12.7.1",
     "nyc": "18.0.0",
     "semantic-release": "25.0.3",
     "typescript": "6.0.2"