Use latest parent pom in all projects

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1308819 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 7cb5b11..0e66c43 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
   <parent>
     <groupId>org.apache.sling</groupId>
     <artifactId>sling</artifactId>
-    <version>11</version>
+    <version>12</version>
     <relativePath>../../../parent/pom.xml</relativePath>
   </parent>