Bump directory-maven-plugin from 0.3.1 to 1.0 (#2977)

diff --git a/demo/pom.xml b/demo/pom.xml
index 534bed1..36ae813 100644
--- a/demo/pom.xml
+++ b/demo/pom.xml
@@ -142,7 +142,7 @@
         <plugin>
           <groupId>org.commonjava.maven.plugins</groupId>
           <artifactId>directory-maven-plugin</artifactId>
-          <version>0.3.1</version>
+          <version>1.0</version>
         </plugin>
         <plugin>
           <artifactId>maven-deploy-plugin</artifactId>