bump nexus-staging-maven-plugin version (#341)

Signed-off-by: rulex123 <[email protected]>

Author: rulex123

pom.xml

@@ -43,7 +43,7 @@
         <maven-javadoc-plugin.version>3.3.1</maven-javadoc-plugin.version>
         <maven-release-plugin.version>2.5.3</maven-release-plugin.version>
         <maven-source-plugin.version>3.0.1</maven-source-plugin.version>
-        <nexus-staging-maven-plugin.version>1.6.8</nexus-staging-maven-plugin.version>
+        <nexus-staging-maven-plugin.version>1.6.13</nexus-staging-maven-plugin.version>
         <versions-maven-plugin.version>2.7</versions-maven-plugin.version>
     </properties>