bump central publishing plugin

Author: swannodette

pom.template.xml

@@ -409,7 +409,7 @@
             <plugin>
               <groupId>org.sonatype.central</groupId>
               <artifactId>central-publishing-maven-plugin</artifactId>
-              <version>0.7.0</version>
+              <version>0.9.0</version>
               <extensions>true</extensions>
               <configuration>
                 <publishingServerId>central</publishingServerId>