Bump version

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop-pdf-images/trunk@1788875 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/build.properties b/build.properties
index 6ba4e48..89959ad 100644
--- a/build.properties
+++ b/build.properties
@@ -1,4 +1,4 @@
-version=2.2.0.SNAPSHOT
+version=2.3.0.SNAPSHOT
 vendor=The Apache Software Foundation (http://xmlgraphics.apache.org)
 year=2007-2017