[maven-release-plugin] prepare release maven-plugin-testing-3.1.0
diff --git a/maven-plugin-testing-harness/pom.xml b/maven-plugin-testing-harness/pom.xml
index 7aa51af..d97f6fd 100644
--- a/maven-plugin-testing-harness/pom.xml
+++ b/maven-plugin-testing-harness/pom.xml
@@ -25,7 +25,7 @@
   <parent>
     <groupId>org.apache.maven.plugin-testing</groupId>
     <artifactId>maven-plugin-testing</artifactId>
-    <version>3.1.0-SNAPSHOT</version>
+    <version>3.1.0</version>
   </parent>
 
   <artifactId>maven-plugin-testing-harness</artifactId>
diff --git a/maven-plugin-testing-tools/pom.xml b/maven-plugin-testing-tools/pom.xml
index a6fde2c..971db8a 100644
--- a/maven-plugin-testing-tools/pom.xml
+++ b/maven-plugin-testing-tools/pom.xml
@@ -25,7 +25,7 @@
   <parent>
     <groupId>org.apache.maven.plugin-testing</groupId>
     <artifactId>maven-plugin-testing</artifactId>
-    <version>3.1.0-SNAPSHOT</version>
+    <version>3.1.0</version>
   </parent>
 
   <artifactId>maven-plugin-testing-tools</artifactId>
diff --git a/maven-test-tools/pom.xml b/maven-test-tools/pom.xml
index 20a63e9..1f8c0d9 100644
--- a/maven-test-tools/pom.xml
+++ b/maven-test-tools/pom.xml
@@ -25,7 +25,7 @@
   <parent>
     <groupId>org.apache.maven.plugin-testing</groupId>
     <artifactId>maven-plugin-testing</artifactId>
-    <version>3.1.0-SNAPSHOT</version>
+    <version>3.1.0</version>
   </parent>
 
   <artifactId>maven-test-tools</artifactId>
diff --git a/pom.xml b/pom.xml
index daafe9d..8f5c171 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,7 +31,7 @@
 
   <groupId>org.apache.maven.plugin-testing</groupId>
   <artifactId>maven-plugin-testing</artifactId>
-  <version>3.1.0-SNAPSHOT</version>
+  <version>3.1.0</version>
   <packaging>pom</packaging>
 
   <name>Maven Plugin Testing</name>
@@ -127,7 +127,7 @@
     <connection>scm:git:https://git-wip-us.apache.org/repos/asf/maven-plugin-testing.git</connection>
     <developerConnection>scm:git:https://git-wip-us.apache.org/repos/asf/maven-plugin-testing.git</developerConnection>
     <url>https://github.com/apache/maven-plugin-testing/</url>
-    <tag>HEAD</tag>
+    <tag>maven-plugin-testing-3.1.0</tag>
   </scm>
   <issueManagement>
     <system>jira</system>