Bump xmlunit-core from 2.6.2 to 2.6.3

Bumps [xmlunit-core](https://github.com/xmlunit/xmlunit) from 2.6.2 to 2.6.3.
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/master/RELEASE_NOTES.md)
- [Commits](https://github.com/xmlunit/xmlunit/compare/v2.6.2...v2.6.3)

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

integration-test/pom.xml

@@ -115,7 +115,7 @@
         <dependency>
             <groupId>org.xmlunit</groupId>
             <artifactId>xmlunit-core</artifactId>
-            <version>2.6.2</version>
+            <version>2.6.3</version>
             <scope>test</scope>
         </dependency>
         <dependency>