Update dependency org.objenesis:objenesis to v2.6

Author: renovate-bot

pom.xml

@@ -169,7 +169,7 @@
         <dependency>
             <groupId>org.objenesis</groupId>
             <artifactId>objenesis</artifactId>
-            <version>2.1</version>
+            <version>2.6</version>
             <scope>test</scope>
         </dependency>
         <dependency>