Bump approvaltests from 9.3.0 to 18.5.0

Bumps [approvaltests](https://github.com/approvals/ApprovalTests.Java) from 9.3.0 to 18.5.0.
- [Release notes](https://github.com/approvals/ApprovalTests.Java/releases)
- [Commits](https://github.com/approvals/ApprovalTests.Java/commits/18.5.0)

---
updated-dependencies:
- dependency-name: com.approvaltests:approvaltests
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

pom.xml

@@ -36,7 +36,7 @@
         <dependency>
             <groupId>com.approvaltests</groupId>
             <artifactId>approvaltests</artifactId>
-            <version>9.3.0</version>
+            <version>18.5.0</version>
             <scope>test</scope>
         </dependency>
     </dependencies>