deps: update dependency com.github.ben-manes.caffeine:caffeine to v2.9.0 (#79)

Author: renovate-bot

pom.xml

@@ -105,7 +105,7 @@
     <dependency>
       <groupId>com.github.ben-manes.caffeine</groupId>
       <artifactId>caffeine</artifactId>
-      <version>2.8.8</version>
+      <version>2.9.0</version>
     </dependency>
     <dependency>
       <groupId>org.scala-lang</groupId>