Update xmlunit.version to v2.11.0 (#255)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pom.xml

@@ -20,7 +20,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <jsoncompare.version>7.1</jsoncompare.version>
-        <xmlunit.version>2.10.4</xmlunit.version>
+        <xmlunit.version>2.11.0</xmlunit.version>
         <surefire.version>3.5.4</surefire.version>
         <jackson.version>2.20.0</jackson.version>
         <jackson.databind.version>2.17.2</jackson.databind.version>