[maven-release-plugin] prepare for next development iteration

pom.xml

@@ -30,7 +30,7 @@
   </parent>
 
   <artifactId>maven-shade-plugin</artifactId>
-  <version>3.2.4</version>
+  <version>3.3.0-SNAPSHOT</version>
   <packaging>maven-plugin</packaging>
 
   <name>Apache Maven Shade Plugin</name>
@@ -47,7 +47,7 @@
     <connection>scm:git:https://gitbox.apache.org/repos/asf/maven-shade-plugin.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/maven-shade-plugin.git</developerConnection>
     <url>https://github.com/apache/maven-shade-plugin/tree/${project.scm.tag}</url>
-    <tag>maven-shade-plugin-3.2.4</tag>
+    <tag>HEAD</tag>
   </scm>
   <issueManagement>
     <system>jira</system>
@@ -69,7 +69,7 @@
     <javaVersion>7</javaVersion>
     <currentVersion>${project.version}</currentVersion>
     <asmVersion>8.0</asmVersion>
-    <project.build.outputTimestamp>2020-05-23T15:29:17Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2020-05-23T15:29:40Z</project.build.outputTimestamp>
   </properties>
 
   <contributors>