use released plexus compiler version

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1630003 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index d90b069..b960971 100644
--- a/pom.xml
+++ b/pom.xml
@@ -60,7 +60,7 @@
   <properties>
     <mavenVersion>2.0.9</mavenVersion>
     <mavenPluginPluginVersion>3.2</mavenPluginPluginVersion>
-    <plexusCompilerVersion>2.4-SNAPSHOT</plexusCompilerVersion>
+    <plexusCompilerVersion>2.4</plexusCompilerVersion>
     <groovyVersion>1.8.0</groovyVersion>
     <groovyEclipseCompilerVersion>2.7.0-01</groovyEclipseCompilerVersion>
     <groovy-eclipse-batch>2.0.4-04</groovy-eclipse-batch>