Bump nl.jqno.equalsverifier:equalsverifier from 3.7.2 to 3.15.6

Bumps [nl.jqno.equalsverifier:equalsverifier](https://github.com/jqno/equalsverifier) from 3.7.2 to 3.15.6.
- [Release notes](https://github.com/jqno/equalsverifier/releases)
- [Changelog](https://github.com/jqno/equalsverifier/blob/main/CHANGELOG.md)
- [Commits](jqno/equalsverifier@equalsverifier-3.7.2...equalsverifier-3.15.6)

---
updated-dependencies:
- dependency-name: nl.jqno.equalsverifier:equalsverifier
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -93,7 +93,7 @@
 
         <!-- Test scope -->
         <configuration-as-code.version>1.47</configuration-as-code.version>
-        <equalsverifier.version>3.7.2</equalsverifier.version>
+        <equalsverifier.version>3.15.6</equalsverifier.version>
         <mockito-core.version>4.1.0</mockito-core.version>
         <concurrency>2</concurrency>
         <skipUTs>false</skipUTs>