bump to minimum 3.0.4 maven, update yuicompressor plugin to latest (1.4.0)

git-svn-id: https://svn.apache.org/repos/asf/shindig/trunk@1618598 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 2fa34a9..142aec3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -53,7 +53,7 @@
   </properties>
 
   <prerequisites>
-    <maven>2.2.1</maven>
+    <maven>3.0.4</maven>
   </prerequisites>
 
   <!-- ====================================================================== -->
@@ -1246,7 +1246,7 @@
         <plugin>
           <groupId>net.alchim31.maven</groupId>
           <artifactId>yuicompressor-maven-plugin</artifactId>
-          <version>1.1</version>
+          <version>1.4.0</version>
         </plugin>
 
         <plugin>