解决guava版本冲突

Author: saleson

spring-cloud-gray-client/pom.xml

@@ -24,6 +24,7 @@
         <dependency>
             <groupId>com.github.ben-manes.caffeine</groupId>
             <artifactId>caffeine</artifactId>
+            <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>cn.springcloud.gray</groupId>