Bump caffeine from 2.8.6 to 2.8.8

Bumps [caffeine](https://github.com/ben-manes/caffeine) from 2.8.6 to 2.8.8.
- [Release notes](https://github.com/ben-manes/caffeine/releases)
- [Commits](ben-manes/caffeine@v2.8.6...v2.8.8)

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

pom.xml

@@ -72,7 +72,7 @@
     <dependency>
       <groupId>com.github.ben-manes.caffeine</groupId>
       <artifactId>caffeine</artifactId>
-      <version>2.8.6</version>
+      <version>2.8.8</version>
     </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>