VOL-3978 - update to go 1.16.3

Change-Id: I4a1c78722b3e4019dfd288fa9c89b7d90924050a
diff --git a/VERSION b/VERSION
index bcfbf47..dc1e644 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.6.0-dev
+1.6.0