[maven-release-plugin] prepare release 1.8.1

pom.xml

@@ -10,7 +10,7 @@
 
   <artifactId>sonar-widget-lab-plugin</artifactId>
   <groupId>org.sonarsource.widget-lab</groupId>
-  <version>1.9-SNAPSHOT</version>
+  <version>1.8.1</version>
   <packaging>sonar-plugin</packaging>
 
   <name>Widget Lab</name>
@@ -72,7 +72,7 @@
     <connection>scm:git:https://github.com/SonarCommunity/sonar-widget-lab.git</connection>
     <developerConnection>scm:git:[email protected]:SonarCommunity/sonar-widget-lab.git</developerConnection>
     <url>https://github.com/SonarCommunity/sonar-widget-lab</url>
-    <tag>HEAD</tag>
+    <tag>1.8.1</tag>
   </scm>
 
   <build>