Bump org.xmlunit:xmlunit-assertj from 2.12.0 to 2.13.0 (#260)

Bumps [org.xmlunit:xmlunit-assertj](https://github.com/xmlunit/xmlunit) from 2.12.0 to 2.13.0.
- [Release notes](https://github.com/xmlunit/xmlunit/releases)
- [Changelog](https://github.com/xmlunit/xmlunit/blob/main/RELEASE_NOTES.md)
- [Commits](xmlunit/xmlunit@v2.12.0...v2.13.0)

---
updated-dependencies:
- dependency-name: org.xmlunit:xmlunit-assertj
  dependency-version: 2.13.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -54,7 +54,7 @@
         <dependency>
             <groupId>org.xmlunit</groupId>
             <artifactId>xmlunit-assertj</artifactId>
-            <version>2.12.0</version>
+            <version>2.13.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>