deps(upgrade): 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] <[email protected]>

build.gradle.kts

@@ -93,7 +93,7 @@ dependencies {
         exclude("org.slf4j", "slf4j-api")
     }
     api("com.google.code.findbugs:jsr305:3.0.2")
-    api("com.github.ben-manes.caffeine:caffeine:2.9.3") {
+    api("com.github.ben-manes.caffeine:caffeine:3.1.8") {
         because("Last version to support JDK 8.")
     }