Update to Sling Parent POM 22 with baselining enabled

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1628609 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 193133e..4b77d1f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@
     <parent>
         <groupId>org.apache.sling</groupId>
         <artifactId>sling</artifactId>
-        <version>20</version>
+        <version>22</version>
         <relativePath>../../parent/pom.xml</relativePath>
     </parent>