upgrade nexus-staging verison

Author: stevehu

pom.xml

@@ -98,6 +98,7 @@
         <version.exec-maven>1.6.0</version.exec-maven>
         <version.maven-surefire>2.22.2</version.maven-surefire>
         <version.maven-source>3.1.0</version.maven-source>
+        <version.nexus-staging-maven>1.7.0</version.nexus-staging-maven>
     </properties>
 
     <dependencies>
@@ -433,7 +434,7 @@
             <plugin>
                 <groupId>org.sonatype.plugins</groupId>
                 <artifactId>nexus-staging-maven-plugin</artifactId>
-                <version>1.6.8</version>
+                <version>${version.nexus-staging-maven}</version>
                 <extensions>true</extensions>
                 <configuration>
                     <serverId>ossrh</serverId>