Bumping VERSION to 1.4.0-dev

Change-Id: Icf3e2bf43c552e0b8e6323752b6852b4695309c5
diff --git a/VERSION b/VERSION
index 3a3cd8c..c3f0d2b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.3.1
+1.4.0-dev