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>

Author: dependabot[bot]

pom.xml

@@ -42,7 +42,7 @@
     <javax.annotation.version>1.3.2</javax.annotation.version>
     <snakeyaml.version>1.27</snakeyaml.version>
     <slf4j.version>1.7.30</slf4j.version>
-    <caffeine.version>2.8.6</caffeine.version>
+    <caffeine.version>2.8.8</caffeine.version>
     <protobuf.version>3.14.0</protobuf.version>
     <junit.version>4.13</junit.version>
     <bucket4j.version>4.10.0</bucket4j.version>