Tag 1.2.0 release

Change-Id: I7e88d6e319117e04817b9d75df1db0567e5e9fcf
diff --git a/VERSION b/VERSION
index 0c64b5c..26aaba0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.2.0-dev
+1.2.0