Bump equalsverifier from 3.8.3 to 3.9

Bumps [equalsverifier](https://github.com/jqno/equalsverifier) from 3.8.3 to 3.9.
- [Release notes](https://github.com/jqno/equalsverifier/releases)
- [Changelog](https://github.com/jqno/equalsverifier/blob/main/CHANGELOG.md)
- [Commits](jqno/equalsverifier@equalsverifier-3.8.3...equalsverifier-3.9)

---
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

@@ -165,7 +165,7 @@
     <dependency>
       <groupId>nl.jqno.equalsverifier</groupId>
       <artifactId>equalsverifier</artifactId>
-      <version>3.8.3</version>
+      <version>3.9</version>
       <scope>test</scope>
     </dependency>
     <!--Credential Binding Plugin-->