[ISSUE #253] Add new plugin to auto release

Author: RongtongJin

pom.xml

@@ -248,6 +248,17 @@
                     <artifactId>coveralls-maven-plugin</artifactId>
                     <version>4.3.0</version>
                 </plugin>
+                <plugin>
+                    <groupId>org.sonatype.plugins</groupId>
+                    <artifactId>nexus-staging-maven-plugin</artifactId>
+                    <version>1.6.3</version>
+                    <extensions>true</extensions>
+                    <configuration>
+                        <serverId>sonatype-nexus-staging</serverId>
+                        <nexusUrl>https://s01.oss.sonatype.org/</nexusUrl>
+                        <autoReleaseAfterClose>true</autoReleaseAfterClose>
+                    </configuration>
+                </plugin>
             </plugins>
         </pluginManagement>