[maven-release-plugin] prepare release gson-parent-2.8.9

Author: eamonnmcmanus

Diff for: extras/pom.xml

@@ -1,16 +1,14 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>com.google.code.gson</groupId>
     <artifactId>gson-parent</artifactId>
-    <version>2.8.9-SNAPSHOT</version>
+    <version>2.8.9</version>
   </parent>
 
   <artifactId>gson-extras</artifactId>
   <packaging>jar</packaging>
-  <version>1.0-SNAPSHOT</version>
+  <version>2.8.9</version>
   <inceptionYear>2008</inceptionYear>
   <name>Gson Extras</name>
   <description>Google Gson grab bag of utilities, type adapters, etc.</description>

Diff for: gson/pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.code.gson</groupId>
     <artifactId>gson-parent</artifactId>
-    <version>2.8.9-SNAPSHOT</version>
+    <version>2.8.9</version>
   </parent>
 
   <artifactId>gson</artifactId>

Diff for: pom.xml

@@ -11,7 +11,7 @@
 
   <groupId>com.google.code.gson</groupId>
   <artifactId>gson-parent</artifactId>
-  <version>2.8.9-SNAPSHOT</version>
+  <version>2.8.9</version>
   <packaging>pom</packaging>
 
   <name>Gson Parent</name>
@@ -32,7 +32,7 @@
     <url>https://github.com/google/gson/</url>
     <connection>scm:git:https://github.com/google/gson.git</connection>
     <developerConnection>scm:git:git@github.com:google/gson.git</developerConnection>
-    <tag>HEAD</tag>
+    <tag>gson-parent-2.8.9</tag>
   </scm>
 
   <issueManagement>