Upgrade easymock from 5.4.0 to 5.5.0

Author: sikeoka

geowebcache/pom.xml

@@ -317,7 +317,7 @@
       <dependency>
         <groupId>org.easymock</groupId>
         <artifactId>easymock</artifactId>
-        <version>5.4.0</version>
+        <version>5.5.0</version>
         <scope>test</scope>
       </dependency>
       <dependency>