Update nexus staging plugin to support java 8

Author: developernotes

pom.xml

@@ -113,6 +113,13 @@
           <nexusUrl>https://oss.sonatype.org/</nexusUrl>
           <autoReleaseAfterClose>false</autoReleaseAfterClose>
         </configuration>
+        <dependencies>
+          <dependency>
+            <groupId>com.thoughtworks.xstream</groupId>
+            <artifactId>xstream</artifactId>
+            <version>1.4.7</version>
+          </dependency>
+        </dependencies>
       </plugin>
     </plugins>
   </build>