[maven-release-plugin] prepare release twincolgrid-3.1.0

Author: FlowingCodeCI

pom.xml

@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>com.flowingcode.vaadin.addons</groupId>
 	<artifactId>twincolgrid</artifactId>
-	<version>3.1.0-SNAPSHOT</version>
+	<version>3.1.0</version>
 	<name>TwinColGrid add-on</name>
 	<description>Dual list component based on Vaadin Grids</description>
 	<url>https://www.flowingcode.com/en/open-source/</url>
@@ -66,7 +66,7 @@
         <url>https://github.com/FlowingCode/TwinColGridAddon</url>
         <connection>scm:git:git://github.com/FlowingCode/TwinColGridAddon.git</connection>
         <developerConnection>scm:git:ssh://git@github.com:/FlowingCode/TwinColGridAddon.git</developerConnection>
-        <tag>HEAD</tag>
+        <tag>twincolgrid-3.1.0</tag>
     </scm>
 
     <dependencyManagement>