[maven-release-plugin] prepare release 0.3.1

Author: jradcliff

google-ads/pom.xml

@@ -21,15 +21,15 @@
   <parent>
     <groupId>com.google.api-ads</groupId>
     <artifactId>google-ads-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version>
+    <version>0.3.1</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api-ads</groupId>
   <artifactId>google-ads</artifactId>
   <packaging>jar</packaging>
-  <version>0.3.1-SNAPSHOT</version>
+  <version>0.3.1</version>
   <name>Google Ads API client library for Java</name>
   <description>
     Google Ads API client library for Java.

pom.xml

@@ -22,7 +22,7 @@
 
   <groupId>com.google.api-ads</groupId>
   <artifactId>google-ads-parent</artifactId>
-  <version>0.3.1-SNAPSHOT</version>
+  <version>0.3.1</version>
 
   <packaging>pom</packaging>
   <name>Google Ads API client library for Java project</name>
@@ -56,7 +56,7 @@
     <url>
       https://github.com/googleads/google-ads-java
     </url>
-    <tag>HEAD</tag>
+    <tag>0.3.1</tag>
   </scm>
 
   <developers>