[maven-release-plugin] prepare for next development iteration
diff --git a/maven-release-api/pom.xml b/maven-release-api/pom.xml
index efbcc49..03985e6 100644
--- a/maven-release-api/pom.xml
+++ b/maven-release-api/pom.xml
@@ -23,7 +23,7 @@
   <parent>
     <groupId>org.apache.maven.release</groupId>
     <artifactId>maven-release</artifactId>
-    <version>3.0.0-M4</version>
+    <version>3.0.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-release-api</artifactId>
diff --git a/maven-release-manager/pom.xml b/maven-release-manager/pom.xml
index 5fc77d6..e1c6368 100644
--- a/maven-release-manager/pom.xml
+++ b/maven-release-manager/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.maven.release</groupId>
     <artifactId>maven-release</artifactId>
-    <version>3.0.0-M4</version>
+    <version>3.0.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-release-manager</artifactId>
@@ -35,7 +35,7 @@
     <dependency>
       <groupId>org.apache.maven.release</groupId>
       <artifactId>maven-release-api</artifactId>
-      <version>3.0.0-M4</version>
+      <version>3.0.0-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
diff --git a/maven-release-plugin/pom.xml b/maven-release-plugin/pom.xml
index ac3c4b8..b1d3d28 100644
--- a/maven-release-plugin/pom.xml
+++ b/maven-release-plugin/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.maven.release</groupId>
     <artifactId>maven-release</artifactId>
-    <version>3.0.0-M4</version>
+    <version>3.0.0-SNAPSHOT</version>
   </parent>
 
   <groupId>org.apache.maven.plugins</groupId>
@@ -54,7 +54,7 @@
     <dependency>
       <groupId>org.apache.maven.release</groupId>
       <artifactId>maven-release-manager</artifactId>
-      <version>3.0.0-M4</version>
+      <version>3.0.0-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>org.apache.maven</groupId>
@@ -85,13 +85,13 @@
     <dependency>
       <groupId>org.apache.maven.release</groupId>
       <artifactId>maven-release-oddeven-policy</artifactId>
-      <version>3.0.0-M4</version>
+      <version>3.0.0-SNAPSHOT</version>
       <optional>true</optional>
     </dependency>
     <dependency>
       <groupId>org.apache.maven.release</groupId>
       <artifactId>maven-release-semver-policy</artifactId>
-      <version>3.0.0-M4</version>
+      <version>3.0.0-SNAPSHOT</version>
       <optional>true</optional>
     </dependency>
     
diff --git a/maven-release-policies/maven-release-oddeven-policy/pom.xml b/maven-release-policies/maven-release-oddeven-policy/pom.xml
index 2402e63..8c8eb2c 100644
--- a/maven-release-policies/maven-release-oddeven-policy/pom.xml
+++ b/maven-release-policies/maven-release-oddeven-policy/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.maven.release</groupId>
     <artifactId>maven-release</artifactId>
-    <version>3.0.0-M4</version>
+    <version>3.0.0-SNAPSHOT</version>
     <relativePath>../..</relativePath>
   </parent>
 
diff --git a/maven-release-policies/maven-release-semver-policy/pom.xml b/maven-release-policies/maven-release-semver-policy/pom.xml
index 57a87b3..0f003d2 100644
--- a/maven-release-policies/maven-release-semver-policy/pom.xml
+++ b/maven-release-policies/maven-release-semver-policy/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.maven.release</groupId>
     <artifactId>maven-release</artifactId>
-    <version>3.0.0-M4</version>
+    <version>3.0.0-SNAPSHOT</version>
     <relativePath>../..</relativePath>
   </parent>
 
diff --git a/pom.xml b/pom.xml
index 04493eb..d589592 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
 
   <groupId>org.apache.maven.release</groupId>
   <artifactId>maven-release</artifactId>
-  <version>3.0.0-M4</version>
+  <version>3.0.0-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>Maven Release</name>
@@ -48,7 +48,7 @@
     <connection>scm:git:https://gitbox.apache.org/repos/asf/maven-release.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/maven-release.git</developerConnection>
     <url>https://github.com/apache/maven-release/tree/${project.scm.tag}</url>
-    <tag>maven-release-3.0.0-M4</tag>
+    <tag>HEAD</tag>
   </scm>
   <issueManagement>
     <system>jira</system>
@@ -91,7 +91,7 @@
     <javaVersion>8</javaVersion>
     <mavenVersion>3.0</mavenVersion>
     <maven.site.path>maven-release-archives/maven-release-LATEST</maven.site.path>
-    <project.build.outputTimestamp>2021-04-12T17:08:52Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2021-04-12T17:12:25Z</project.build.outputTimestamp>
   </properties>
 
   <build>