Bump xos libraries to version 4.0.0

Change-Id: Idf2383dacbe95544e898b1686df9d3e874c73376
diff --git a/VERSION b/VERSION
index ac2cdeb..2468aa9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.1.3
+3.0.0-dev