build(deps): update digitick/sepa-xml requirement from ^2.1 to ^3.0

Updates the requirements on [digitick/sepa-xml](https://github.com/php-sepa-xml/php-sepa-xml) to permit the latest version.
- [Release notes](https://github.com/php-sepa-xml/php-sepa-xml/releases)
- [Changelog](https://github.com/php-sepa-xml/php-sepa-xml/blob/master/CHANGELOG.md)
- [Commits](php-sepa-xml/php-sepa-xml@2.1.0...3.0.0)

---
updated-dependencies:
- dependency-name: digitick/sepa-xml
  dependency-version: 3.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

composer.json

@@ -32,7 +32,7 @@
         "davidepastore/codice-fiscale": "^0.9.1",
         "devcode-it/ical-easy-reader": "dev-main",
         "devcode-it/sdd_ita": "dev-master",
-        "digitick/sepa-xml": "^2.1",
+        "digitick/sepa-xml": "^3.0",
         "doctrine/sql-formatter": "^1.5",
         "dragonmantank/cron-expression": "^3.0",
         "endroid/qr-code": "^6.0",