[maven-release-plugin] prepare release maven-dependency-tree-3.1.0

pom.xml

@@ -28,7 +28,7 @@
   </parent>
 
   <artifactId>maven-dependency-tree</artifactId>
-  <version>3.1.0-SNAPSHOT</version>
+  <version>3.1.0</version>
 
   <name>Apache Maven Dependency Tree</name>
   <description>A tree-based API for resolution of Maven project dependencies</description>
@@ -37,7 +37,7 @@
     <connection>scm:git:https://gitbox.apache.org/repos/asf/maven-dependency-tree.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/maven-dependency-tree.git</developerConnection>
     <url>https://github.com/apache/maven-dependency-tree/tree/${project.scm.tag}</url>
-    <tag>HEAD</tag>
+    <tag>maven-dependency-tree-3.1.0</tag>
   </scm>
   <issueManagement>
     <system>jira</system>
@@ -56,7 +56,7 @@
 
   <properties>
 	<javaVersion>8</javaVersion>
-    <project.build.outputTimestamp>2020-02-07T09:03:59Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2021-07-08T10:19:18Z</project.build.outputTimestamp>
   </properties>
 
   <contributors>