chore(deps): bump com.github.ben-manes.caffeine:caffeine

Bumps [com.github.ben-manes.caffeine:caffeine](https://github.com/ben-manes/caffeine) from 2.9.3 to 3.1.8.
- [Release notes](https://github.com/ben-manes/caffeine/releases)
- [Commits](ben-manes/caffeine@v2.9.3...v3.1.8)

---
updated-dependencies:
- dependency-name: com.github.ben-manes.caffeine:caffeine
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

bukkit/pom.xml

@@ -387,7 +387,7 @@
         <dependency>
             <groupId>com.github.ben-manes.caffeine</groupId>
             <artifactId>caffeine</artifactId>
-            <version>2.9.3</version>
+            <version>3.1.8</version>
             <scope>provided</scope>
         </dependency>