Update veewee/xml requirement from ^2.6 to ^2.6 || ^3.0

Updates the requirements on [veewee/xml](https://github.com/veewee/xml) to permit the latest version.
- [Release notes](https://github.com/veewee/xml/releases)
- [Commits](veewee/xml@2.6.0...3.1.0)

---
updated-dependencies:
- dependency-name: veewee/xml
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -18,7 +18,7 @@
         "goetas-webservices/xsd-reader": "^0.4.1",
         "php-soap/engine": "^2.6",
         "php-soap/wsdl": "^1.4",
-        "veewee/xml": "^2.6",
+        "veewee/xml": "^2.6 || ^3.0",
         "azjezz/psl": "^2.4",
         "symfony/console": "^5.4 || ^6.0 || ^7.0"
     },