Bump nl.jqno.equalsverifier:equalsverifier from 3.15.5 to 3.15.6

Bumps [nl.jqno.equalsverifier:equalsverifier](https://github.com/jqno/equalsverifier) from 3.15.5 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-3.15.5...equalsverifier-3.15.6)

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

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

pom.xml

@@ -99,7 +99,7 @@
             <dependency>
                 <groupId>nl.jqno.equalsverifier</groupId>
                 <artifactId>equalsverifier</artifactId>
-                <version>3.15.5</version>
+                <version>3.15.6</version>
             </dependency>
 
             <dependency>