Bump xos libraries to version 4.0.0

Change-Id: I694d1b6e0dabdeb2d3a399c29893886e6f270f90
diff --git a/VERSION b/VERSION
index 336c367..227cea2 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.1.0-dev
+2.0.0