Bump xos libraries to version 4.0.0

Change-Id: I7cc0eed4930ba0948e07befd9c23b4a6e5503df1
diff --git a/VERSION b/VERSION
index 7c8d436..2468aa9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.5-dev
+3.0.0-dev